64257870 has 16 divisors (see below), whose sum is σ = 154218960. Its totient is φ = 17135424.

The previous prime is 64257859. The next prime is 64257871. The reversal of 64257870 is 7875246.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64257871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070935 + ... + 1070994.

It is an arithmetic number, because the mean of its divisors is an integer number (9638685).

Almost surely, 2^64257870 is an apocalyptic number.

64257870 is an abundant number, since it is smaller than the sum of its proper divisors (89961090).

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

64257870 is a wasteful number, since it uses less digits than its factorization.

64257870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141939.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 64257870 is about 8016.1006730205. The cubic root of 64257870 is about 400.5365092395.

The spelling of 64257870 in words is "sixty-four million, two hundred fifty-seven thousand, eight hundred seventy".