64987120 has 40 divisors (see below), whose sum is σ = 164833200. Its totient is φ = 23631360.

The previous prime is 64987103. The next prime is 64987127. The reversal of 64987120 is 2178946.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 64987120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64987127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36045 + ... + 37804.

It is an arithmetic number, because the mean of its divisors is an integer number (4120830).

Almost surely, 2^64987120 is an apocalyptic number.

It is an amenable number.

64987120 is an abundant number, since it is smaller than the sum of its proper divisors (99846080).

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

64987120 is a wasteful number, since it uses less digits than its factorization.

64987120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73873 (or 73867 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 64987120 is about 8061.4589250334. The cubic root of 64987120 is about 402.0460166954.

The spelling of 64987120 in words is "sixty-four million, nine hundred eighty-seven thousand, one hundred twenty".