64765020 has 24 divisors (see below), whose sum is σ = 181342224. Its totient is φ = 17270656.

The previous prime is 64765007. The next prime is 64765031. The reversal of 64765020 is 2056746.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 539649 + ... + 539768.

It is an arithmetic number, because the mean of its divisors is an integer number (7555926).

Almost surely, 2^64765020 is an apocalyptic number.

64765020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64765020 is an abundant number, since it is smaller than the sum of its proper divisors (116577204).

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

64765020 is a wasteful number, since it uses less digits than its factorization.

64765020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079429 (or 1079427 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 64765020 is about 8047.6717129863. The cubic root of 64765020 is about 401.5874830758.

The spelling of 64765020 in words is "sixty-four million, seven hundred sixty-five thousand, twenty".