189617428 has 192 divisors, whose sum is σ = 487710720. Its totient is φ = 62092800.

The previous prime is 189617383. The next prime is 189617447. The reversal of 189617428 is 824716981.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2670633 + ... + 2670703.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^189617428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189617428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243855360).

189617428 is an abundant number, since it is smaller than the sum of its proper divisors (298093292).

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

189617428 is a wasteful number, since it uses less digits than its factorization.

189617428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 156 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 189617428 is about 13770.1644144142. The cubic root of 189617428 is about 574.5035947584.

The spelling of 189617428 in words is "one hundred eighty-nine million, six hundred seventeen thousand, four hundred twenty-eight".