642713298 has 32 divisors (see below), whose sum is σ = 1322713152. Its totient is φ = 208104000.

The previous prime is 642713251. The next prime is 642713317. The reversal of 642713298 is 892317246.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22113 + ... + 42123.

It is an arithmetic number, because the mean of its divisors is an integer number (41334786).

Almost surely, 2^642713298 is an apocalyptic number.

642713298 is an abundant number, since it is smaller than the sum of its proper divisors (679999854).

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

642713298 is a wasteful number, since it uses less digits than its factorization.

642713298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20170.

The product of its digits is 145152, while the sum is 42.

The square root of 642713298 is about 25351.7908243185. The cubic root of 642713298 is about 862.9899972300.

The spelling of 642713298 in words is "six hundred forty-two million, seven hundred thirteen thousand, two hundred ninety-eight".