64363988 has 18 divisors (see below), whose sum is σ = 121969134. Its totient is φ = 29706144.

The previous prime is 64363987. The next prime is 64364017. The reversal of 64363988 is 88936346.

It can be written as a sum of positive squares in 3 ways, for example, as 1669264 + 62694724 = 1292^2 + 7918^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64363987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46931 + ... + 48282.

It is an arithmetic number, because the mean of its divisors is an integer number (6776063).

Almost surely, 2^64363988 is an apocalyptic number.

It is an amenable number.

64363988 is a deficient number, since it is larger than the sum of its proper divisors (57605146).

64363988 is a wasteful number, since it uses less digits than its factorization.

64363988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95243 (or 95228 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The square root of 64363988 is about 8022.7169961304. The cubic root of 64363988 is about 400.7568752796.

The spelling of 64363988 in words is "sixty-four million, three hundred sixty-three thousand, nine hundred eighty-eight".