642378796 has 18 divisors (see below), whose sum is σ = 1194182108. Its totient is φ = 302295360.

The previous prime is 642378787. The next prime is 642378829. The reversal of 642378796 is 697873246.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276690 + ... + 279001.

Almost surely, 2^642378796 is an apocalyptic number.

It is an amenable number.

642378796 is a deficient number, since it is larger than the sum of its proper divisors (551803312).

642378796 is a wasteful number, since it uses less digits than its factorization.

642378796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555729 (or 555710 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 52.

The square root of 642378796 is about 25345.1927591802. The cubic root of 642378796 is about 862.8402560336.

The spelling of 642378796 in words is "six hundred forty-two million, three hundred seventy-eight thousand, seven hundred ninety-six".