189051904 has 66 divisors (see below), whose sum is σ = 396196850. Its totient is φ = 90157056.

The previous prime is 189051893. The next prime is 189051911. The reversal of 189051904 is 409150981.

It can be written as a sum of positive squares in only one way, i.e., 175509504 + 13542400 = 13248^2 + 3680^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 541522 + ... + 541870.

Almost surely, 2^189051904 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 189051904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198098425).

189051904 is an abundant number, since it is smaller than the sum of its proper divisors (207144946).

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

189051904 is an equidigital number, since it uses as much as digits as its factorization.

189051904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 189051904 is about 13749.6146855103. The cubic root of 189051904 is about 573.9318837695.

The spelling of 189051904 in words is "one hundred eighty-nine million, fifty-one thousand, nine hundred four".