189951804 has 120 divisors (see below), whose sum is σ = 577233888. Its totient is φ = 53343360.

The previous prime is 189951803. The next prime is 189951833. The reversal of 189951804 is 408159981.

It is a self number, because there is not a number n which added to its sum of digits gives 189951804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189951803) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 137662 + ... + 139034.

Almost surely, 2^189951804 is an apocalyptic number.

189951804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189951804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288616944).

189951804 is an abundant number, since it is smaller than the sum of its proper divisors (387282084).

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

189951804 is a wasteful number, since it uses less digits than its factorization.

189951804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1446 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 189951804 is about 13782.3003885418. The cubic root of 189951804 is about 574.8410943375.

The spelling of 189951804 in words is "one hundred eighty-nine million, nine hundred fifty-one thousand, eight hundred four".