525069990 has 192 divisors, whose sum is σ = 1547859456. Its totient is φ = 122766336.

The previous prime is 525069953. The next prime is 525070003. The reversal of 525069990 is 99960525.

525069990 is a `hidden beast` number, since 52 + 506 + 9 + 9 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1512997 + ... + 1513343.

It is an arithmetic number, because the mean of its divisors is an integer number (8061768).

Almost surely, 2^525069990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525069990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (773929728).

525069990 is an abundant number, since it is smaller than the sum of its proper divisors (1022789466).

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

525069990 is a wasteful number, since it uses less digits than its factorization.

525069990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 525069990 is about 22914.4057308934. The cubic root of 525069990 is about 806.7501702673.

The spelling of 525069990 in words is "five hundred twenty-five million, sixty-nine thousand, nine hundred ninety".