64920 has 32 divisors (see below), whose sum is σ = 195120. Its totient is φ = 17280.

The previous prime is 64919. The next prime is 64921. The reversal of 64920 is 2946.

It is an interprime number because it is at equal distance from previous prime (64919) and next prime (64921).

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64921) 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, 151 + ... + 390.

2⁶⁴⁹²⁰ is an apocalyptic number.

64920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64920 is an abundant number, since it is smaller than the sum of its proper divisors (130200).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97560).

64920 is a wasteful number, since it uses less digits than its factorization.

64920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 64920 is about 254.7940344671. The cubic root of 64920 is about 40.1907555288.

The spelling of 64920 in words is "sixty-four thousand, nine hundred twenty".