642767426 has 16 divisors (see below), whose sum is σ = 1139883840. Its totient is φ = 265972560.

The previous prime is 642767383. The next prime is 642767443. The reversal of 642767426 is 624767246.

642767426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 791180 + ... + 791991.

It is an arithmetic number, because the mean of its divisors is an integer number (71242740).

Almost surely, 2^642767426 is an apocalyptic number.

642767426 is a deficient number, since it is larger than the sum of its proper divisors (497116414).

642767426 is a wasteful number, since it uses less digits than its factorization.

642767426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583209.

The product of its digits is 677376, while the sum is 44.

The square root of 642767426 is about 25352.8583398401. The cubic root of 642767426 is about 863.0142229677.

The spelling of 642767426 in words is "six hundred forty-two million, seven hundred sixty-seven thousand, four hundred twenty-six".