190086945 has 32 divisors (see below), whose sum is σ = 330749568. Its totient is φ = 92832768.

The previous prime is 190086937. The next prime is 190086959. The reversal of 190086945 is 549680091.

It is not a de Polignac number, because 190086945 - 2³ = 190086937 is a prime.

It is a super-2 number, since 2×190086945² = 72266093318866050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 190086897 and 190086906.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 639 + ... + 19508.

It is an arithmetic number, because the mean of its divisors is an integer number (10335924).

Almost surely, 2^190086945 is an apocalyptic number.

190086945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

190086945 is a deficient number, since it is larger than the sum of its proper divisors (140662623).

190086945 is a wasteful number, since it uses less digits than its factorization.

190086945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20209.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 190086945 is about 13787.2022179991. The cubic root of 190086945 is about 574.9773853740.

The spelling of 190086945 in words is "one hundred ninety million, eighty-six thousand, nine hundred forty-five".