425631940 has 24 divisors (see below), whose sum is σ = 895164480. Its totient is φ = 169998048.

The previous prime is 425631929. The next prime is 425631961. The reversal of 425631940 is 49136524.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 425631896 and 425631905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1920 + ... + 29239.

It is an arithmetic number, because the mean of its divisors is an integer number (37298520).

Almost surely, 2^425631940 is an apocalyptic number.

It is an amenable number.

425631940 is an abundant number, since it is smaller than the sum of its proper divisors (469532540).

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

425631940 is a wasteful number, since it uses less digits than its factorization.

425631940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31851 (or 31849 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 425631940 is about 20630.8492311877. The cubic root of 425631940 is about 752.2197585626.

The spelling of 425631940 in words is "four hundred twenty-five million, six hundred thirty-one thousand, nine hundred forty".