189773420 has 24 divisors (see below), whose sum is σ = 408246048. Its totient is φ = 74057600.

The previous prime is 189773417. The next prime is 189773459. The reversal of 189773420 is 24377981.

It is a Harshad number since it is a multiple of its sum of digits (41).

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 7 ways as a sum of consecutive naturals, for example, 114896 + ... + 116535.

It is an arithmetic number, because the mean of its divisors is an integer number (17010252).

Almost surely, 2^189773420 is an apocalyptic number.

189773420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189773420 is an abundant number, since it is smaller than the sum of its proper divisors (218472628).

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

189773420 is a wasteful number, since it uses less digits than its factorization.

189773420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231481 (or 231479 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 189773420 is about 13775.8273798709. The cubic root of 189773420 is about 574.6610932923.

The spelling of 189773420 in words is "one hundred eighty-nine million, seven hundred seventy-three thousand, four hundred twenty".