188916564 has 48 divisors (see below), whose sum is σ = 448616448. Its totient is φ = 61867008.

The previous prime is 188916551. The next prime is 188916569. The reversal of 188916564 is 465619881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188916569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171664 + ... + 172760.

It is an arithmetic number, because the mean of its divisors is an integer number (9346176).

Almost surely, 2^188916564 is an apocalyptic number.

It is an amenable number.

188916564 is an abundant number, since it is smaller than the sum of its proper divisors (259699884).

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

188916564 is a wasteful number, since it uses less digits than its factorization.

188916564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1342 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 188916564 is about 13744.6922119049. The cubic root of 188916564 is about 573.7948940811.

The spelling of 188916564 in words is "one hundred eighty-eight million, nine hundred sixteen thousand, five hundred sixty-four".