64987188 has 24 divisors (see below), whose sum is σ = 173299392. Its totient is φ = 18567744.

The previous prime is 64987127. The next prime is 64987189. The reversal of 64987188 is 88178946.

It is a self number, because there is not a number n which added to its sum of digits gives 64987188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64987189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386745 + ... + 386912.

It is an arithmetic number, because the mean of its divisors is an integer number (7220808).

Almost surely, 2^64987188 is an apocalyptic number.

It is an amenable number.

64987188 is an abundant number, since it is smaller than the sum of its proper divisors (108312204).

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

64987188 is a wasteful number, since it uses less digits than its factorization.

64987188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773671 (or 773669 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 64987188 is about 8061.4631426311. The cubic root of 64987188 is about 402.0461569238.

The spelling of 64987188 in words is "sixty-four million, nine hundred eighty-seven thousand, one hundred eighty-eight".