425075640 has 128 divisors (see below), whose sum is σ = 1423699200. Its totient is φ = 100638720.

The previous prime is 425075593. The next prime is 425075663. The reversal of 425075640 is 46570524.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53016 + ... + 60504.

It is an arithmetic number, because the mean of its divisors is an integer number (11122650).

Almost surely, 2^425075640 is an apocalyptic number.

425075640 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 425075640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711849600).

425075640 is an abundant number, since it is smaller than the sum of its proper divisors (998623560).

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

425075640 is a wasteful number, since it uses less digits than its factorization.

425075640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7557 (or 7553 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 425075640 is about 20617.3625859371. The cubic root of 425075640 is about 751.8918991661.

The spelling of 425075640 in words is "four hundred twenty-five million, seventy-five thousand, six hundred forty".