189157636 has 12 divisors (see below), whose sum is σ = 337272012. Its totient is φ = 92794208.

The previous prime is 189157621. The next prime is 189157643. The reversal of 189157636 is 636751981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 129960000 + 59197636 = 11400^2 + 7694^2 .

It is a super-2 number, since 2×189157636² = 71561222514216992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445915 + ... + 446338.

It is an arithmetic number, because the mean of its divisors is an integer number (28106001).

Almost surely, 2^189157636 is an apocalyptic number.

It is an amenable number.

189157636 is a deficient number, since it is larger than the sum of its proper divisors (148114376).

189157636 is a wasteful number, since it uses less digits than its factorization.

189157636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892310 (or 892308 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 189157636 is about 13753.4590558157. The cubic root of 189157636 is about 574.0388590769.

The spelling of 189157636 in words is "one hundred eighty-nine million, one hundred fifty-seven thousand, six hundred thirty-six".