199190456 has 8 divisors (see below), whose sum is σ = 373482120. Its totient is φ = 99595224.

The previous prime is 199190449. The next prime is 199190461. The reversal of 199190456 is 654091991.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×199190456² = 79353675522975872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12449396 + ... + 12449411.

It is an arithmetic number, because the mean of its divisors is an integer number (46685265).

Almost surely, 2^199190456 is an apocalyptic number.

It is an amenable number.

199190456 is a deficient number, since it is larger than the sum of its proper divisors (174291664).

199190456 is a wasteful number, since it uses less digits than its factorization.

199190456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24898813 (or 24898809 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 199190456 is about 14113.4848992019. The cubic root of 199190456 is about 584.0134402987.

The spelling of 199190456 in words is "one hundred ninety-nine million, one hundred ninety thousand, four hundred fifty-six".