869731440 has 40 divisors (see below), whose sum is σ = 2696168208. Its totient is φ = 231928320.

The previous prime is 869731427. The next prime is 869731451. The reversal of 869731440 is 44137968.

869731440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 869731392 and 869731401.

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, 1811701 + ... + 1812180.

Almost surely, 2^869731440 is an apocalyptic number.

869731440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

869731440 is an abundant number, since it is smaller than the sum of its proper divisors (1826436768).

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

869731440 is a wasteful number, since it uses less digits than its factorization.

869731440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623897 (or 3623891 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 869731440 is about 29491.2095377589. The cubic root of 869731440 is about 954.5420316348.

The spelling of 869731440 in words is "eight hundred sixty-nine million, seven hundred thirty-one thousand, four hundred forty".