64257290 has 16 divisors (see below), whose sum is σ = 115799112. Its totient is φ = 25672704.

The previous prime is 64257289. The next prime is 64257329. The reversal of 64257290 is 9275246.

It can be written as a sum of positive squares in 4 ways, for example, as 62932489 + 1324801 = 7933^2 + 1151^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64257290.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6482 + ... + 13058.

Almost surely, 2^64257290 is an apocalyptic number.

64257290 is a deficient number, since it is larger than the sum of its proper divisors (51541822).

64257290 is a wasteful number, since it uses less digits than its factorization.

64257290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7561.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 64257290 is about 8016.0644957485. The cubic root of 64257290 is about 400.5353041375.

The spelling of 64257290 in words is "sixty-four million, two hundred fifty-seven thousand, two hundred ninety".