426709638 has 36 divisors (see below), whose sum is σ = 974069460. Its totient is φ = 134629776.

The previous prime is 426709607. The next prime is 426709649. The reversal of 426709638 is 836907624.

426709638 is a `hidden beast` number, since 4 + 2 + 6 + 7 + 0 + 9 + 638 = 666.

It is a super-2 number, since 2×426709638² = 364162230324182088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 426709593 and 426709602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 381456 + ... + 382572.

It is an arithmetic number, because the mean of its divisors is an integer number (27057485).

Almost surely, 2^426709638 is an apocalyptic number.

426709638 is an abundant number, since it is smaller than the sum of its proper divisors (547359822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

426709638 is a wasteful number, since it uses less digits than its factorization.

426709638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 426709638 is about 20656.9513239490. The cubic root of 426709638 is about 752.8540957395.

The spelling of 426709638 in words is "four hundred twenty-six million, seven hundred nine thousand, six hundred thirty-eight".