64308474 has 48 divisors (see below), whose sum is σ = 142857000. Its totient is φ = 20901888.

The previous prime is 64308473. The next prime is 64308487. The reversal of 64308474 is 47480346.

64308474 is a `hidden beast` number, since 643 + 0 + 8 + 4 + 7 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61732449 + 2576025 = 7857^2 + 1605^2 .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (64308473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143002 + ... + 143450.

Almost surely, 2^64308474 is an apocalyptic number.

64308474 is an abundant number, since it is smaller than the sum of its proper divisors (78548526).

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

64308474 is a wasteful number, since it uses less digits than its factorization.

64308474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 64308474 is about 8019.2564493225. The cubic root of 64308474 is about 400.6416244117.

The spelling of 64308474 in words is "sixty-four million, three hundred eight thousand, four hundred seventy-four".