64354920 has 128 divisors (see below), whose sum is σ = 230307840. Its totient is φ = 14065920.

The previous prime is 64354909. The next prime is 64354931. The reversal of 64354920 is 2945346.

It is an interprime number because it is at equal distance from previous prime (64354909) and next prime (64354931).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17655 + ... + 20985.

It is an arithmetic number, because the mean of its divisors is an integer number (1799280).

Almost surely, 2^64354920 is an apocalyptic number.

64354920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64354920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115153920).

64354920 is an abundant number, since it is smaller than the sum of its proper divisors (165952920).

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

64354920 is a wasteful number, since it uses less digits than its factorization.

64354920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375 (or 3371 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 64354920 is about 8022.1518310239. The cubic root of 64354920 is about 400.7380540198.

The spelling of 64354920 in words is "sixty-four million, three hundred fifty-four thousand, nine hundred twenty".