426388138 has 16 divisors (see below), whose sum is σ = 704922624. Its totient is φ = 191813760.

The previous prime is 426388121. The next prime is 426388147. The reversal of 426388138 is 831883624.

It is a junction number, because it is equal to n+sod(n) for n = 426388094 and 426388103.

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, 97770 + ... + 102037.

It is an arithmetic number, because the mean of its divisors is an integer number (44057664).

Almost surely, 2^426388138 is an apocalyptic number.

426388138 is a deficient number, since it is larger than the sum of its proper divisors (278534486).

426388138 is a wasteful number, since it uses less digits than its factorization.

426388138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199917.

The product of its digits is 221184, while the sum is 43.

The square root of 426388138 is about 20649.1679735528. The cubic root of 426388138 is about 752.6649715014.

The spelling of 426388138 in words is "four hundred twenty-six million, three hundred eighty-eight thousand, one hundred thirty-eight".