425262640 has 80 divisors (see below), whose sum is σ = 1125570816. Its totient is φ = 147910400.

The previous prime is 425262637. The next prime is 425262653. The reversal of 425262640 is 46262524.

It is a tau number, because it is divible by the number of its divisors (80).

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, 9735 + ... + 30745.

Almost surely, 2^425262640 is an apocalyptic number.

425262640 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 425262640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (562785408).

425262640 is an abundant number, since it is smaller than the sum of its proper divisors (700308176).

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

425262640 is a wasteful number, since it uses less digits than its factorization.

425262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21058 (or 21052 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 425262640 is about 20621.8970999275. The cubic root of 425262640 is about 752.0021408570.

The spelling of 425262640 in words is "four hundred twenty-five million, two hundred sixty-two thousand, six hundred forty".