525999380 has 48 divisors (see below), whose sum is σ = 1184440320. Its totient is φ = 195506688.

The previous prime is 525999377. The next prime is 525999391. The reversal of 525999380 is 83999525.

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, 17069 + ... + 36651.

It is an arithmetic number, because the mean of its divisors is an integer number (24675840).

Almost surely, 2^525999380 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 525999380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592220160).

525999380 is an abundant number, since it is smaller than the sum of its proper divisors (658440940).

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

525999380 is a wasteful number, since it uses less digits than its factorization.

525999380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19688 (or 19686 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 50.

The square root of 525999380 is about 22934.6763657131. The cubic root of 525999380 is about 807.2258805588.

The spelling of 525999380 in words is "five hundred twenty-five million, nine hundred ninety-nine thousand, three hundred eighty".