426776638 has 32 divisors (see below), whose sum is σ = 688849920. Its totient is φ = 197825760.

The previous prime is 426776599. The next prime is 426776699. The reversal of 426776638 is 836677624.

It is a junction number, because it is equal to n+sod(n) for n = 426776591 and 426776600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234753 + ... + 236563.

It is an arithmetic number, because the mean of its divisors is an integer number (21526560).

Almost surely, 2^426776638 is an apocalyptic number.

426776638 is a deficient number, since it is larger than the sum of its proper divisors (262073282).

426776638 is a wasteful number, since it uses less digits than its factorization.

426776638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992.

The product of its digits is 2032128, while the sum is 49.

The square root of 426776638 is about 20658.5729904076. The cubic root of 426776638 is about 752.8934969154.

The spelling of 426776638 in words is "four hundred twenty-six million, seven hundred seventy-six thousand, six hundred thirty-eight".