425520432 has 80 divisors (see below), whose sum is σ = 1249860480. Its totient is φ = 138535488.

The previous prime is 425520379. The next prime is 425520457. The reversal of 425520432 is 234025524.

It is a happy number.

425520432 is a `hidden beast` number, since 425 + 5 + 204 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 425520396 and 425520405.

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, 7123 + ... + 30029.

It is an arithmetic number, because the mean of its divisors is an integer number (15623256).

Almost surely, 2^425520432 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 425520432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624930240).

425520432 is an abundant number, since it is smaller than the sum of its proper divisors (824340048).

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

425520432 is a wasteful number, since it uses less digits than its factorization.

425520432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22967 (or 22955 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 425520432 is about 20628.1465963377. The cubic root of 425520432 is about 752.1540634248.

Adding to 425520432 its reverse (234025524), we get a palindrome (659545956).

The spelling of 425520432 in words is "four hundred twenty-five million, five hundred twenty thousand, four hundred thirty-two".