64996290 has 32 divisors (see below), whose sum is σ = 173324160. Its totient is φ = 17332272.

The previous prime is 64996277. The next prime is 64996291. The reversal of 64996290 is 9269946.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64996291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120094 + ... + 120633.

It is an arithmetic number, because the mean of its divisors is an integer number (5416380).

Almost surely, 2^64996290 is an apocalyptic number.

64996290 is an abundant number, since it is smaller than the sum of its proper divisors (108327870).

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

64996290 is a wasteful number, since it uses less digits than its factorization.

64996290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240743 (or 240737 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 64996290 is about 8062.0276605827. The cubic root of 64996290 is about 402.0649260249.

The spelling of 64996290 in words is "sixty-four million, nine hundred ninety-six thousand, two hundred ninety".