426634520 has 64 divisors (see below), whose sum is σ = 1059035040. Its totient is φ = 153676800.

The previous prime is 426634517. The next prime is 426634547. The reversal of 426634520 is 25436624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11315 + ... + 31325.

Almost surely, 2^426634520 is an apocalyptic number.

426634520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426634520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529517520).

426634520 is an abundant number, since it is smaller than the sum of its proper divisors (632400520).

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

426634520 is a wasteful number, since it uses less digits than its factorization.

426634520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20076 (or 20072 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 426634520 is about 20655.1330182112. The cubic root of 426634520 is about 752.8099156477.

The spelling of 426634520 in words is "four hundred twenty-six million, six hundred thirty-four thousand, five hundred twenty".