64995290 has 32 divisors (see below), whose sum is σ = 118918800. Its totient is φ = 25574400.

The previous prime is 64995289. The next prime is 64995299. The reversal of 64995290 is 9259946.

It can be written as a sum of positive squares in 8 ways, for example, as 5257849 + 59737441 = 2293^2 + 7729^2 .

It is not an unprimeable number, because it can be changed into a prime (64995299) 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, 269570 + ... + 269810.

Almost surely, 2^64995290 is an apocalyptic number.

64995290 is a deficient number, since it is larger than the sum of its proper divisors (53923510).

64995290 is a wasteful number, since it uses less digits than its factorization.

64995290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 64995290 is about 8061.9656412069. The cubic root of 64995290 is about 402.0628640252.

The spelling of 64995290 in words is "sixty-four million, nine hundred ninety-five thousand, two hundred ninety".