869557942 has 16 divisors (see below), whose sum is σ = 1461371472. Its totient is φ = 384570720.

The previous prime is 869557921. The next prime is 869557943. The reversal of 869557942 is 249755968.

It is a super-2 number, since 2×869557942² = 1512262028990550728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869557943) 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 7 ways as a sum of consecutive naturals, for example, 533313 + ... + 534940.

It is an arithmetic number, because the mean of its divisors is an integer number (91335717).

Almost surely, 2^869557942 is an apocalyptic number.

869557942 is a deficient number, since it is larger than the sum of its proper divisors (591813530).

869557942 is a wasteful number, since it uses less digits than its factorization.

869557942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068303.

The product of its digits is 5443200, while the sum is 55.

The square root of 869557942 is about 29488.2678704599. The cubic root of 869557942 is about 954.4785552790.

The spelling of 869557942 in words is "eight hundred sixty-nine million, five hundred fifty-seven thousand, nine hundred forty-two".