642381504 has 56 divisors (see below), whose sum is σ = 1754477568. Its totient is φ = 207217920.

The previous prime is 642381503. The next prime is 642381511. The reversal of 642381504 is 405183246.

It is not an unprimeable number, because it can be changed into a prime (642381503) 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, 48012 + ... + 59915.

Almost surely, 2^642381504 is an apocalyptic number.

642381504 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

642381504 is an abundant number, since it is smaller than the sum of its proper divisors (1112096064).

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

642381504 is a wasteful number, since it uses less digits than its factorization.

642381504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107973 (or 107963 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 642381504 is about 25345.2461814834. The cubic root of 642381504 is about 862.8414684896.

The spelling of 642381504 in words is "six hundred forty-two million, three hundred eighty-one thousand, five hundred four".