190409794 has 8 divisors (see below), whose sum is σ = 286528140. Its totient is φ = 94900416.

The previous prime is 190409789. The next prime is 190409797. The reversal of 190409794 is 497904091.

It can be written as a sum of positive squares in 2 ways, for example, as 169130025 + 21279769 = 13005^2 + 4613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×190409794² = 72511779302244872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 190409794.

It is not an unprimeable number, because it can be changed into a prime (190409797) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 151459 + ... + 152710.

Almost surely, 2^190409794 is an apocalyptic number.

190409794 is a deficient number, since it is larger than the sum of its proper divisors (96118346).

190409794 is a wasteful number, since it uses less digits than its factorization.

190409794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304484.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 190409794 is about 13798.9055363098. The cubic root of 190409794 is about 575.3027204978.

The spelling of 190409794 in words is "one hundred ninety million, four hundred nine thousand, seven hundred ninety-four".