189040780 has 12 divisors (see below), whose sum is σ = 396985680. Its totient is φ = 75616304.

The previous prime is 189040777. The next prime is 189040781. The reversal of 189040780 is 87040981.

It is not an unprimeable number, because it can be changed into a prime (189040781) 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, 4726000 + ... + 4726039.

It is an arithmetic number, because the mean of its divisors is an integer number (33082140).

Almost surely, 2^189040780 is an apocalyptic number.

189040780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189040780 is an abundant number, since it is smaller than the sum of its proper divisors (207944900).

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

189040780 is a wasteful number, since it uses less digits than its factorization.

189040780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9452048 (or 9452046 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 189040780 is about 13749.2101591328. The cubic root of 189040780 is about 573.9206266432.

The spelling of 189040780 in words is "one hundred eighty-nine million, forty thousand, seven hundred eighty".