189136436 has 12 divisors (see below), whose sum is σ = 337234212. Its totient is φ = 92783808.

The previous prime is 189136433. The next prime is 189136447. The reversal of 189136436 is 634631981.

It can be written as a sum of positive squares in 2 ways, for example, as 115691536 + 73444900 = 10756^2 + 8570^2 .

It is a junction number, because it is equal to n+sod(n) for n = 189136393 and 189136402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189136433) 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, 445865 + ... + 446288.

It is an arithmetic number, because the mean of its divisors is an integer number (28102851).

Almost surely, 2^189136436 is an apocalyptic number.

It is an amenable number.

189136436 is a deficient number, since it is larger than the sum of its proper divisors (148097776).

189136436 is a wasteful number, since it uses less digits than its factorization.

189136436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892210 (or 892208 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 189136436 is about 13752.6883190160. The cubic root of 189136436 is about 574.0174129809.

The spelling of 189136436 in words is "one hundred eighty-nine million, one hundred thirty-six thousand, four hundred thirty-six".