64439382 has 32 divisors (see below), whose sum is σ = 148953600. Its totient is φ = 18203328.

The previous prime is 64439381. The next prime is 64439407. The reversal of 64439382 is 28393446.

It is a super-5 number, since 5×64439382⁵ (a number of 40 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64439382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64439381) 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, 4882 + ... + 12357.

It is an arithmetic number, because the mean of its divisors is an integer number (4654800).

Almost surely, 2^64439382 is an apocalyptic number.

64439382 is an abundant number, since it is smaller than the sum of its proper divisors (84514218).

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

64439382 is a wasteful number, since it uses less digits than its factorization.

64439382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17340.

The product of its digits is 124416, while the sum is 39.

The square root of 64439382 is about 8027.4144031562. The cubic root of 64439382 is about 400.9132923225.

The spelling of 64439382 in words is "sixty-four million, four hundred thirty-nine thousand, three hundred eighty-two".