869557572 has 192 divisors, whose sum is σ = 2627654400. Its totient is φ = 246343680.

The previous prime is 869557571. The next prime is 869557597. The reversal of 869557572 is 275755968.

869557572 is a `hidden beast` number, since 8 + 69 + 5 + 5 + 7 + 572 = 666.

It is a super-2 number, since 2×869557572² = 1512260742045070368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (869557571) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 986572 + ... + 987452.

It is an arithmetic number, because the mean of its divisors is an integer number (13685700).

Almost surely, 2^869557572 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 869557572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313827200).

869557572 is an abundant number, since it is smaller than the sum of its proper divisors (1758096828).

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

869557572 is a wasteful number, since it uses less digits than its factorization.

869557572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 955 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 54.

The square root of 869557572 is about 29488.2615967778. The cubic root of 869557572 is about 954.4784199010.

The spelling of 869557572 in words is "eight hundred sixty-nine million, five hundred fifty-seven thousand, five hundred seventy-two".