64763280 has 80 divisors (see below), whose sum is σ = 223080960. Its totient is φ = 17269632.

The previous prime is 64763263. The next prime is 64763291. The reversal of 64763280 is 8236746.

64763280 is a `hidden beast` number, since 647 + 6 + 3 + 2 + 8 + 0 = 666.

64763280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12832 + ... + 17151.

It is an arithmetic number, because the mean of its divisors is an integer number (2788512).

Almost surely, 2^64763280 is an apocalyptic number.

64763280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64763280 is an abundant number, since it is smaller than the sum of its proper divisors (158317680).

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

64763280 is a wasteful number, since it uses less digits than its factorization.

64763280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30005 (or 29993 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 64763280 is about 8047.5636064588. The cubic root of 64763280 is about 401.5838866463.

The spelling of 64763280 in words is "sixty-four million, seven hundred sixty-three thousand, two hundred eighty".