425985440 has 96 divisors (see below), whose sum is σ = 1056271104. Its totient is φ = 162155520.

The previous prime is 425985409. The next prime is 425985457. The reversal of 425985440 is 44589524.

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, 277475 + ... + 279005.

It is an arithmetic number, because the mean of its divisors is an integer number (11002824).

Almost surely, 2^425985440 is an apocalyptic number.

425985440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 425985440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528135552).

425985440 is an abundant number, since it is smaller than the sum of its proper divisors (630285664).

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

425985440 is a wasteful number, since it uses less digits than its factorization.

425985440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 425985440 is about 20639.4147203839. The cubic root of 425985440 is about 752.4279479067.

The spelling of 425985440 in words is "four hundred twenty-five million, nine hundred eighty-five thousand, four hundred forty".