425899440 has 240 divisors, whose sum is σ = 1522759680. Its totient is φ = 106375680.

The previous prime is 425899433. The next prime is 425899493. The reversal of 425899440 is 44998524.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2229745 + ... + 2229935.

It is an arithmetic number, because the mean of its divisors is an integer number (6344832).

Almost surely, 2^425899440 is an apocalyptic number.

425899440 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 425899440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761379840).

425899440 is an abundant number, since it is smaller than the sum of its proper divisors (1096860240).

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

425899440 is a wasteful number, since it uses less digits than its factorization.

425899440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 425899440 is about 20637.3312228108. The cubic root of 425899440 is about 752.3773099017.

The spelling of 425899440 in words is "four hundred twenty-five million, eight hundred ninety-nine thousand, four hundred forty".