189367720 has 16 divisors (see below), whose sum is σ = 426077460. Its totient is φ = 75747072.

The previous prime is 189367697. The next prime is 189367727. The reversal of 189367720 is 27763981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 175986756 + 13380964 = 13266^2 + 3658^2 .

It is not an unprimeable number, because it can be changed into a prime (189367727) 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, 2367057 + ... + 2367136.

Almost surely, 2^189367720 is an apocalyptic number.

189367720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189367720 is an abundant number, since it is smaller than the sum of its proper divisors (236709740).

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

189367720 is a wasteful number, since it uses less digits than its factorization.

189367720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734204 (or 4734200 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 189367720 is about 13761.0944332201. The cubic root of 189367720 is about 574.2512952294.

The spelling of 189367720 in words is "one hundred eighty-nine million, three hundred sixty-seven thousand, seven hundred twenty".