64186340 has 12 divisors (see below), whose sum is σ = 134791356. Its totient is φ = 25674528.

The previous prime is 64186333. The next prime is 64186363. The reversal of 64186340 is 4368146.

It can be written as a sum of positive squares in 2 ways, for example, as 38217124 + 25969216 = 6182^2 + 5096^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64186297 and 64186306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604639 + ... + 1604678.

It is an arithmetic number, because the mean of its divisors is an integer number (11232613).

Almost surely, 2^64186340 is an apocalyptic number.

It is an amenable number.

64186340 is an abundant number, since it is smaller than the sum of its proper divisors (70605016).

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

64186340 is a wasteful number, since it uses less digits than its factorization.

64186340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209326 (or 3209324 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 64186340 is about 8011.6377851223. The cubic root of 64186340 is about 400.3878321773.

The spelling of 64186340 in words is "sixty-four million, one hundred eighty-six thousand, three hundred forty".