190891280 has 40 divisors (see below), whose sum is σ = 445708824. Its totient is φ = 76032000.

The previous prime is 190891243. The next prime is 190891301. The reversal of 190891280 is 82198091.

It can be written as a sum of positive squares in 4 ways, for example, as 87909376 + 102981904 = 9376^2 + 10148^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14330 + ... + 24230.

Almost surely, 2^190891280 is an apocalyptic number.

190891280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190891280 is an abundant number, since it is smaller than the sum of its proper divisors (254817544).

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

190891280 is a wasteful number, since it uses less digits than its factorization.

190891280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155 (or 10149 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 190891280 is about 13816.3410496412. The cubic root of 190891280 is about 575.7872317291.

The spelling of 190891280 in words is "one hundred ninety million, eight hundred ninety-one thousand, two hundred eighty".