188669540 has 12 divisors (see below), whose sum is σ = 396206076. Its totient is φ = 75467808.

The previous prime is 188669539. The next prime is 188669567. The reversal of 188669540 is 45966881.

It can be written as a sum of positive squares in 2 ways, for example, as 118243876 + 70425664 = 10874^2 + 8392^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4716719 + ... + 4716758.

It is an arithmetic number, because the mean of its divisors is an integer number (33017173).

Almost surely, 2^188669540 is an apocalyptic number.

188669540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188669540 is an abundant number, since it is smaller than the sum of its proper divisors (207536536).

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

188669540 is a wasteful number, since it uses less digits than its factorization.

188669540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9433486 (or 9433484 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 188669540 is about 13735.7031126914. The cubic root of 188669540 is about 573.5446902676.

The spelling of 188669540 in words is "one hundred eighty-eight million, six hundred sixty-nine thousand, five hundred forty".