64690576 has 40 divisors (see below), whose sum is σ = 135821664. Its totient is φ = 29729280.

The previous prime is 64690547. The next prime is 64690597. The reversal of 64690576 is 67509646.

64690576 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 7 ways as a sum of consecutive naturals, for example, 8931 + ... + 14461.

Almost surely, 2^64690576 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64690576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67910832).

64690576 is an abundant number, since it is smaller than the sum of its proper divisors (71131088).

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

64690576 is a wasteful number, since it uses less digits than its factorization.

64690576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5599 (or 5593 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 64690576 is about 8043.0451944522. The cubic root of 64690576 is about 401.4335561542.

The spelling of 64690576 in words is "sixty-four million, six hundred ninety thousand, five hundred seventy-six".