64628290 has 16 divisors (see below), whose sum is σ = 118806912. Its totient is φ = 25301104.

The previous prime is 64628231. The next prime is 64628293. The reversal of 64628290 is 9282646.

It is not an unprimeable number, because it can be changed into a prime (64628293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68284 + ... + 69223.

It is an arithmetic number, because the mean of its divisors is an integer number (7425432).

Almost surely, 2^64628290 is an apocalyptic number.

64628290 is a deficient number, since it is larger than the sum of its proper divisors (54178622).

64628290 is a wasteful number, since it uses less digits than its factorization.

64628290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137561.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 64628290 is about 8039.1722210685. The cubic root of 64628290 is about 401.3046774154.

The spelling of 64628290 in words is "sixty-four million, six hundred twenty-eight thousand, two hundred ninety".