191492450 has 54 divisors (see below), whose sum is σ = 379593729. Its totient is φ = 71861040.

The previous prime is 191492449. The next prime is 191492519. The reversal of 191492450 is 54294191.

It can be written as a sum of positive squares in 2 ways, for example, as 187662601 + 3829849 = 13699^2 + 1957^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=9785.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191492450.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1859099 + ... + 1859201.

Almost surely, 2^191492450 is an apocalyptic number.

191492450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191492450 is a deficient number, since it is larger than the sum of its proper divisors (188101279).

191492450 is a wasteful number, since it uses less digits than its factorization.

191492450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 191492450 is about 13838.0797078207. The cubic root of 191492450 is about 576.3910366355.

The spelling of 191492450 in words is "one hundred ninety-one million, four hundred ninety-two thousand, four hundred fifty".