525749240 has 32 divisors (see below), whose sum is σ = 1202333760. Its totient is φ = 206851200.

The previous prime is 525749173. The next prime is 525749251. The reversal of 525749240 is 42947525.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 525749194 and 525749203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105296 + ... + 110175.

It is an arithmetic number, because the mean of its divisors is an integer number (37572930).

Almost surely, 2^525749240 is an apocalyptic number.

It is an amenable number.

525749240 is an abundant number, since it is smaller than the sum of its proper divisors (676584520).

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

525749240 is a wasteful number, since it uses less digits than its factorization.

525749240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215543 (or 215539 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 525749240 is about 22929.2224028640. Note that the first 3 decimals coincide. The cubic root of 525749240 is about 807.0979010050.

The spelling of 525749240 in words is "five hundred twenty-five million, seven hundred forty-nine thousand, two hundred forty".