189771480 has 48 divisors (see below), whose sum is σ = 616758480. Its totient is φ = 50605632.

The previous prime is 189771473. The next prime is 189771499. The reversal of 189771480 is 84177981.

189771480 is a `hidden beast` number, since 18 + 97 + 71 + 480 = 666.

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 (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263212 + ... + 263931.

It is an arithmetic number, because the mean of its divisors is an integer number (12849135).

Almost surely, 2^189771480 is an apocalyptic number.

189771480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189771480 is an abundant number, since it is smaller than the sum of its proper divisors (426987000).

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

189771480 is a wasteful number, since it uses less digits than its factorization.

189771480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527160 (or 527153 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 189771480 is about 13775.7569664973. The cubic root of 189771480 is about 574.6591350863.

The spelling of 189771480 in words is "one hundred eighty-nine million, seven hundred seventy-one thousand, four hundred eighty".