642278048 has 12 divisors (see below), whose sum is σ = 1264484970. Its totient is φ = 321139008.

The previous prime is 642277981. The next prime is 642278081. The reversal of 642278048 is 840872246.

It can be written as a sum of positive squares in only one way, i.e., 555639184 + 86638864 = 23572^2 + 9308^2 .

It is a junction number, because it is equal to n+sod(n) for n = 642277996 and 642278014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035563 + ... + 10035626.

Almost surely, 2^642278048 is an apocalyptic number.

It is an amenable number.

642278048 is a deficient number, since it is larger than the sum of its proper divisors (622206922).

642278048 is a wasteful number, since it uses less digits than its factorization.

642278048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20071199 (or 20071191 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 642278048 is about 25343.2051643039. The cubic root of 642278048 is about 862.7951455912.

The spelling of 642278048 in words is "six hundred forty-two million, two hundred seventy-eight thousand, forty-eight".