64183940 has 24 divisors (see below), whose sum is σ = 134957760. Its totient is φ = 25640928.

The previous prime is 64183927. The next prime is 64183943. The reversal of 64183940 is 4938146.

It is a self number, because there is not a number n which added to its sum of digits gives 64183940.

It is not an unprimeable number, because it can be changed into a prime (64183943) 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, 19751 + ... + 22769.

It is an arithmetic number, because the mean of its divisors is an integer number (5623240).

Almost surely, 2^64183940 is an apocalyptic number.

It is an amenable number.

64183940 is an abundant number, since it is smaller than the sum of its proper divisors (70773820).

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

64183940 is a wasteful number, since it uses less digits than its factorization.

64183940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 64183940 is about 8011.4880016137. The cubic root of 64183940 is about 400.3828417968.

The spelling of 64183940 in words is "sixty-four million, one hundred eighty-three thousand, nine hundred forty".