426640932 has 72 divisors (see below), whose sum is σ = 1148719936. Its totient is φ = 138358368.

The previous prime is 426640919. The next prime is 426640943. The reversal of 426640932 is 239046624.

426640932 is a `hidden beast` number, since 4 + 2 + 6 + 640 + 9 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30033 + ... + 41895.

Almost surely, 2^426640932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426640932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574359968).

426640932 is an abundant number, since it is smaller than the sum of its proper divisors (722079004).

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

426640932 is a wasteful number, since it uses less digits than its factorization.

426640932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11919 (or 11905 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 426640932 is about 20655.2882332830. The cubic root of 426640932 is about 752.8136870202.

The spelling of 426640932 in words is "four hundred twenty-six million, six hundred forty thousand, nine hundred thirty-two".