64688590 has 16 divisors (see below), whose sum is σ = 116653680. Its totient is φ = 25827840.

The previous prime is 64688579. The next prime is 64688629. The reversal of 64688590 is 9588646.

It is a super-2 number, since 2×64688590² = 8369227352376200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64688590.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (7290855).

Almost surely, 2^64688590 is an apocalyptic number.

64688590 is a deficient number, since it is larger than the sum of its proper divisors (51965090).

64688590 is a wasteful number, since it uses less digits than its factorization.

64688590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11907.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 64688590 is about 8042.9217328033. The cubic root of 64688590 is about 401.4294481102.

The spelling of 64688590 in words is "sixty-four million, six hundred eighty-eight thousand, five hundred ninety".