642628342 has 16 divisors (see below), whose sum is σ = 1021507200. Its totient is φ = 302666560.

The previous prime is 642628307. The next prime is 642628379. The reversal of 642628342 is 243826246.

It is a congruent number.

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, 132742 + ... + 137497.

It is an arithmetic number, because the mean of its divisors is an integer number (63844200).

Almost surely, 2^642628342 is an apocalyptic number.

642628342 is a deficient number, since it is larger than the sum of its proper divisors (378878858).

642628342 is a wasteful number, since it uses less digits than its factorization.

642628342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270311.

The product of its digits is 110592, while the sum is 37.

The square root of 642628342 is about 25350.1152265626. The cubic root of 642628342 is about 862.9519712501.

The spelling of 642628342 in words is "six hundred forty-two million, six hundred twenty-eight thousand, three hundred forty-two".