64382820 has 48 divisors (see below), whose sum is σ = 180629568. Its totient is φ = 17134720.

The previous prime is 64382803. The next prime is 64382821. The reversal of 64382820 is 2828346.

It is a super-2 number, since 2×64382820² = 8290295022304800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64382821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48607 + ... + 49913.

It is an arithmetic number, because the mean of its divisors is an integer number (3763116).

Almost surely, 2^64382820 is an apocalyptic number.

64382820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64382820 is an abundant number, since it is smaller than the sum of its proper divisors (116246748).

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

64382820 is a wasteful number, since it uses less digits than its factorization.

64382820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140 (or 2138 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 64382820 is about 8023.8905775191. The cubic root of 64382820 is about 400.7959567482.

The spelling of 64382820 in words is "sixty-four million, three hundred eighty-two thousand, eight hundred twenty".