869961372 has 96 divisors (see below), whose sum is σ = 2440972800. Its totient is φ = 235882752.

The previous prime is 869961359. The next prime is 869961377. The reversal of 869961372 is 273169968.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869961377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140698 + ... + 146750.

It is an arithmetic number, because the mean of its divisors is an integer number (25426800).

Almost surely, 2^869961372 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 869961372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220486400).

869961372 is an abundant number, since it is smaller than the sum of its proper divisors (1571011428).

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

869961372 is a wasteful number, since it uses less digits than its factorization.

869961372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6155 (or 6153 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 869961372 is about 29495.1075943113. The cubic root of 869961372 is about 954.6261420509.

The spelling of 869961372 in words is "eight hundred sixty-nine million, nine hundred sixty-one thousand, three hundred seventy-two".