190909628 has 96 divisors (see below), whose sum is σ = 426746880. Its totient is φ = 72737280.

The previous prime is 190909619. The next prime is 190909661. The reversal of 190909628 is 826909091.

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 31 ways as a sum of consecutive naturals, for example, 2145008 + ... + 2145096.

It is an arithmetic number, because the mean of its divisors is an integer number (4445280).

Almost surely, 2^190909628 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 190909628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213373440).

190909628 is an abundant number, since it is smaller than the sum of its proper divisors (235837252).

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

190909628 is a wasteful number, since it uses less digits than its factorization.

190909628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 190909628 is about 13817.0050300345. The cubic root of 190909628 is about 575.8056788886.

The spelling of 190909628 in words is "one hundred ninety million, nine hundred nine thousand, six hundred twenty-eight".