189913428 has 18 divisors (see below), whose sum is σ = 480059034. Its totient is φ = 63304464.

The previous prime is 189913411. The next prime is 189913429. The reversal of 189913428 is 824319981.

189913428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 178543044 + 11370384 = 13362^2 + 3372^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×189913428² = 72134220269422368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189913429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2637651 + ... + 2637722.

Almost surely, 2^189913428 is an apocalyptic number.

189913428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

189913428 is an abundant number, since it is smaller than the sum of its proper divisors (290145606).

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

189913428 is a wasteful number, since it uses less digits than its factorization.

189913428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275383 (or 5275378 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 189913428 is about 13780.9080977997. The cubic root of 189913428 is about 574.8023799774.

The spelling of 189913428 in words is "one hundred eighty-nine million, nine hundred thirteen thousand, four hundred twenty-eight".