642880748 has 6 divisors (see below), whose sum is σ = 1125041316. Its totient is φ = 321440372.

The previous prime is 642880739. The next prime is 642880753. The reversal of 642880748 is 847088246.

It is a happy number.

It is a super-2 number, since 2×642880748² = 826591312298079008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80360090 + ... + 80360097.

It is an arithmetic number, because the mean of its divisors is an integer number (187506886).

Almost surely, 2^642880748 is an apocalyptic number.

It is an amenable number.

642880748 is a deficient number, since it is larger than the sum of its proper divisors (482160568).

642880748 is a wasteful number, since it uses less digits than its factorization.

642880748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160720191 (or 160720189 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 47.

The square root of 642880748 is about 25355.0931372772. The cubic root of 642880748 is about 863.0649373977.

The spelling of 642880748 in words is "six hundred forty-two million, eight hundred eighty thousand, seven hundred forty-eight".