64319380 has 24 divisors (see below), whose sum is σ = 136386432. Its totient is φ = 25477152.

The previous prime is 64319371. The next prime is 64319383. The reversal of 64319380 is 8391346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64319383) 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, 13552 + ... + 17671.

It is an arithmetic number, because the mean of its divisors is an integer number (5682768).

Almost surely, 2^64319380 is an apocalyptic number.

It is an amenable number.

64319380 is an abundant number, since it is smaller than the sum of its proper divisors (72067052).

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

64319380 is a wasteful number, since it uses less digits than its factorization.

64319380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31335 (or 31333 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 64319380 is about 8019.9364087254. The cubic root of 64319380 is about 400.6642712486.

It can be divided in two parts, 643193 and 80, that multiplied together give a triangular number (51455440 = T₁₀₁₄₄).

The spelling of 64319380 in words is "sixty-four million, three hundred nineteen thousand, three hundred eighty".