425730816 has 270 divisors, whose sum is σ = 1480234140. Its totient is φ = 121347072.

The previous prime is 425730793. The next prime is 425730829. The reversal of 425730816 is 618037524.

425730816 is a `hidden beast` number, since 4 + 2 + 573 + 0 + 81 + 6 = 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 29 ways as a sum of consecutive naturals, for example, 1015855 + ... + 1016273.

Almost surely, 2^425730816 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 425730816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740117070).

425730816 is an abundant number, since it is smaller than the sum of its proper divisors (1054503324).

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

425730816 is an equidigital number, since it uses as much as digits as its factorization.

425730816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 425730816 is about 20633.2454063824. The cubic root of 425730816 is about 752.2780019377.

The spelling of 425730816 in words is "four hundred twenty-five million, seven hundred thirty thousand, eight hundred sixteen".