190398728 has 16 divisors (see below), whose sum is σ = 384459180. Its totient is φ = 87876288.

The previous prime is 190398713. The next prime is 190398731. The reversal of 190398728 is 827893091.

It can be written as a sum of positive squares in 2 ways, for example, as 190384804 + 13924 = 13798^2 + 118^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915275 + ... + 915482.

Almost surely, 2^190398728 is an apocalyptic number.

It is an amenable number.

190398728 is an abundant number, since it is smaller than the sum of its proper divisors (194060452).

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

190398728 is a wasteful number, since it uses less digits than its factorization.

190398728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830776 (or 1830772 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 190398728 is about 13798.5045566540. The cubic root of 190398728 is about 575.2915753722.

The spelling of 190398728 in words is "one hundred ninety million, three hundred ninety-eight thousand, seven hundred twenty-eight".