425663872 has 32 divisors (see below), whose sum is σ = 851445000. Its totient is φ = 211968000.

The previous prime is 425663851. The next prime is 425663891. The reversal of 425663872 is 278366524.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25504 + ... + 38752.

Almost surely, 2^425663872 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 425663872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425722500).

425663872 is an abundant number, since it is smaller than the sum of its proper divisors (425781128).

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

425663872 is a wasteful number, since it uses less digits than its factorization.

425663872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13514 (or 13502 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 425663872 is about 20631.6231062900. The cubic root of 425663872 is about 752.2385692442.

The spelling of 425663872 in words is "four hundred twenty-five million, six hundred sixty-three thousand, eight hundred seventy-two".