64539290 has 8 divisors (see below), whose sum is σ = 116170740. Its totient is φ = 25815712.

The previous prime is 64539283. The next prime is 64539313. The reversal of 64539290 is 9293546.

It can be written as a sum of positive squares in 2 ways, for example, as 64529089 + 10201 = 8033^2 + 101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3226955 + ... + 3226974.

Almost surely, 2^64539290 is an apocalyptic number.

64539290 is a deficient number, since it is larger than the sum of its proper divisors (51631450).

64539290 is a wasteful number, since it uses less digits than its factorization.

64539290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453936.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 64539290 is about 8033.6349182671. The cubic root of 64539290 is about 401.1203797763.

The spelling of 64539290 in words is "sixty-four million, five hundred thirty-nine thousand, two hundred ninety".