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64128810 = 2352137627
BaseRepresentation
bin1111010010100…
…0011100101010
311110200002012010
43310220130222
5112404110220
610210300350
71406041314
oct364503452
9143602163
1064128810
1133220a19
12195876b6
1310394355
1487347b4
15596b1e0
hex3d2872a

64128810 has 16 divisors (see below), whose sum is σ = 153909216. Its totient is φ = 17101008.

The previous prime is 64128809. The next prime is 64128817. The reversal of 64128810 is 1882146.

64128810 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×641288102 = 8225008544032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2137627 = 64128810 / (6 + 4 + 1 + 2 + 8 + 8 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (64128817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068784 + ... + 1068843.

It is an arithmetic number, because the mean of its divisors is an integer number (9619326).

Almost surely, 264128810 is an apocalyptic number.

64128810 is an abundant number, since it is smaller than the sum of its proper divisors (89780406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64128810 is a wasteful number, since it uses less digits than its factorization.

64128810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137637.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 64128810 is about 8008.0465782861. The cubic root of 64128810 is about 400.2681743328.

The spelling of 64128810 in words is "sixty-four million, one hundred twenty-eight thousand, eight hundred ten".

Divisors: 1 2 3 5 6 10 15 30 2137627 4275254 6412881 10688135 12825762 21376270 32064405 64128810