525283640 has 64 divisors (see below), whose sum is σ = 1367884800. Its totient is φ = 177810048.

The previous prime is 525283639. The next prime is 525283673. The reversal of 525283640 is 46382525.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 525283640.

It is a congruent number.

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, 10247 + ... + 33993.

It is an arithmetic number, because the mean of its divisors is an integer number (21373200).

Almost surely, 2^525283640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525283640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683942400).

525283640 is an abundant number, since it is smaller than the sum of its proper divisors (842601160).

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

525283640 is a wasteful number, since it uses less digits than its factorization.

525283640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23844 (or 23840 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 525283640 is about 22919.0671712441. The cubic root of 525283640 is about 806.8595771428.

The spelling of 525283640 in words is "five hundred twenty-five million, two hundred eighty-three thousand, six hundred forty".