189995040 has 72 divisors (see below), whose sum is σ = 648362988. Its totient is φ = 50664960.

The previous prime is 189995023. The next prime is 189995081. The reversal of 189995040 is 40599981.

It can be written as a sum of positive squares in 2 ways, for example, as 184851216 + 5143824 = 13596^2 + 2268^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64531 + ... + 67410.

Almost surely, 2^189995040 is an apocalyptic number.

189995040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189995040 is an abundant number, since it is smaller than the sum of its proper divisors (458367948).

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

189995040 is a wasteful number, since it uses less digits than its factorization.

189995040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131962 (or 131951 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 189995040 is about 13783.8688328060. The cubic root of 189995040 is about 574.8847053019.

The spelling of 189995040 in words is "one hundred eighty-nine million, nine hundred ninety-five thousand, forty".