1642508872 has 32 divisors (see below), whose sum is σ = 3164971320. Its totient is φ = 798645760.

The previous prime is 1642508851. The next prime is 1642508887. The reversal of 1642508872 is 2788052461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 749335876 + 893172996 = 27374^2 + 29886^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96078 + ... + 111874.

Almost surely, 2^1642508872 is an apocalyptic number.

It is an amenable number.

1642508872 is a deficient number, since it is larger than the sum of its proper divisors (1522462448).

1642508872 is a wasteful number, since it uses less digits than its factorization.

1642508872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16161 (or 16157 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 1642508872 is about 40527.8777139884. The cubic root of 1642508872 is about 1179.8747525783.

The spelling of 1642508872 in words is "one billion, six hundred forty-two million, five hundred eight thousand, eight hundred seventy-two".