525944640 has 448 divisors, whose sum is σ = 1984760064. Its totient is φ = 116785152.

The previous prime is 525944621. The next prime is 525944687. The reversal of 525944640 is 46449525.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7849887 + ... + 7849953.

It is an arithmetic number, because the mean of its divisors is an integer number (4430268).

Almost surely, 2^525944640 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 525944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992380032).

525944640 is an abundant number, since it is smaller than the sum of its proper divisors (1458815424).

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

525944640 is a wasteful number, since it uses less digits than its factorization.

525944640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 525944640 is about 22933.4829452484. The cubic root of 525944640 is about 807.1978773080.

The spelling of 525944640 in words is "five hundred twenty-five million, nine hundred forty-four thousand, six hundred forty".