189801954 has 24 divisors (see below), whose sum is σ = 426469680. Its totient is φ = 63267156.

The previous prime is 189801947. The next prime is 189801959. The reversal of 189801954 is 459108981.

It is not an unprimeable number, because it can be changed into a prime (189801959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194784 + ... + 195755.

It is an arithmetic number, because the mean of its divisors is an integer number (17769570).

Almost surely, 2^189801954 is an apocalyptic number.

189801954 is an abundant number, since it is smaller than the sum of its proper divisors (236667726).

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

189801954 is an equidigital number, since it uses as much as digits as its factorization.

189801954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390556 (or 390544 counting only the distinct ones).

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

The square root of 189801954 is about 13776.8629956170. The cubic root of 189801954 is about 574.6898935283.

The spelling of 189801954 in words is "one hundred eighty-nine million, eight hundred one thousand, nine hundred fifty-four".