189478550 has 12 divisors (see below), whose sum is σ = 352430196. Its totient is φ = 75791400.

The previous prime is 189478537. The next prime is 189478561. The reversal of 189478550 is 55874981.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 189478495 and 189478504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1894736 + ... + 1894835.

It is an arithmetic number, because the mean of its divisors is an integer number (29369183).

Almost surely, 2^189478550 is an apocalyptic number.

189478550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189478550 is a deficient number, since it is larger than the sum of its proper divisors (162951646).

189478550 is a wasteful number, since it uses less digits than its factorization.

189478550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789583 (or 3789578 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 189478550 is about 13765.1207768040. The cubic root of 189478550 is about 574.3633028072.

The spelling of 189478550 in words is "one hundred eighty-nine million, four hundred seventy-eight thousand, five hundred fifty".