869369840 has 20 divisors (see below), whose sum is σ = 2021285064. Its totient is φ = 347747904.

The previous prime is 869369827. The next prime is 869369849. The reversal of 869369840 is 48963968.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869369849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5433482 + ... + 5433641.

Almost surely, 2^869369840 is an apocalyptic number.

869369840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

869369840 is an abundant number, since it is smaller than the sum of its proper divisors (1151915224).

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

869369840 is a wasteful number, since it uses less digits than its factorization.

869369840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10867136 (or 10867130 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 869369840 is about 29485.0782600284. The cubic root of 869369840 is about 954.4097263320.

The spelling of 869369840 in words is "eight hundred sixty-nine million, three hundred sixty-nine thousand, eight hundred forty".