642178472 has 16 divisors (see below), whose sum is σ = 1296706740. Its totient is φ = 296390016.

The previous prime is 642178429. The next prime is 642178483. The reversal of 642178472 is 274871246.

It is a happy number.

642178472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 636351076 + 5827396 = 25226^2 + 2414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3087293 + ... + 3087500.

Almost surely, 2^642178472 is an apocalyptic number.

It is an amenable number.

642178472 is an abundant number, since it is smaller than the sum of its proper divisors (654528268).

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

642178472 is a wasteful number, since it uses less digits than its factorization.

642178472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6174812 (or 6174808 counting only the distinct ones).

The product of its digits is 150528, while the sum is 41.

The square root of 642178472 is about 25341.2405379058. The cubic root of 642178472 is about 862.7505552823.

The spelling of 642178472 in words is "six hundred forty-two million, one hundred seventy-eight thousand, four hundred seventy-two".