64813700 has 72 divisors (see below), whose sum is σ = 163864512. Its totient is φ = 21790080.

The previous prime is 64813663. The next prime is 64813711. The reversal of 64813700 is 731846.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36227 + ... + 37973.

It is an arithmetic number, because the mean of its divisors is an integer number (2275896).

Almost surely, 2^64813700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64813700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81932256).

64813700 is an abundant number, since it is smaller than the sum of its proper divisors (99050812).

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

64813700 is a wasteful number, since it uses less digits than its factorization.

64813700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1814 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 64813700 is about 8050.6956221186. The cubic root of 64813700 is about 401.6880743245.

The spelling of 64813700 in words is "sixty-four million, eight hundred thirteen thousand, seven hundred".