642541392 has 60 divisors (see below), whose sum is σ = 1892874880. Its totient is φ = 202906944.

The previous prime is 642541379. The next prime is 642541421. The reversal of 642541392 is 293145246.

It is a happy number.

642541392 is a `hidden beast` number, since 642 + 5 + 4 + 1 + 3 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114688 + ... + 120159.

Almost surely, 2^642541392 is an apocalyptic number.

It is an amenable number.

642541392 is an abundant number, since it is smaller than the sum of its proper divisors (1250333488).

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

642541392 is a wasteful number, since it uses less digits than its factorization.

642541392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234880 (or 234871 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 642541392 is about 25348.4001862050. The cubic root of 642541392 is about 862.9130492930.

The spelling of 642541392 in words is "six hundred forty-two million, five hundred forty-one thousand, three hundred ninety-two".