189977040 has 360 divisors, whose sum is σ = 748264608. Its totient is φ = 42823680.

The previous prime is 189977027. The next prime is 189977071. The reversal of 189977040 is 40779981.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2288839 + ... + 2288921.

Almost surely, 2^189977040 is an apocalyptic number.

189977040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189977040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374132304).

189977040 is an abundant number, since it is smaller than the sum of its proper divisors (558287568).

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

189977040 is a wasteful number, since it uses less digits than its factorization.

189977040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 189977040 is about 13783.2158801928. The cubic root of 189977040 is about 574.8665500008.

The spelling of 189977040 in words is "one hundred eighty-nine million, nine hundred seventy-seven thousand, forty".