869863760 has 40 divisors (see below), whose sum is σ = 2025546696. Its totient is φ = 347409920.

The previous prime is 869863759. The next prime is 869863777. The reversal of 869863760 is 67368968.

It can be written as a sum of positive squares in 4 ways, for example, as 93238336 + 776625424 = 9656^2 + 27868^2 .

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

It is a super-2 number, since 2×869863760² = 1513325921922675200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46130 + ... + 62190.

Almost surely, 2^869863760 is an apocalyptic number.

869863760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

869863760 is an abundant number, since it is smaller than the sum of its proper divisors (1155682936).

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

869863760 is a wasteful number, since it uses less digits than its factorization.

869863760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16751 (or 16745 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 869863760 is about 29493.4528327899. The cubic root of 869863760 is about 954.5904368440.

The spelling of 869863760 in words is "eight hundred sixty-nine million, eight hundred sixty-three thousand, seven hundred sixty".