190399812 has 12 divisors (see below), whose sum is σ = 444266256. Its totient is φ = 63466600.

The previous prime is 190399801. The next prime is 190399843. The reversal of 190399812 is 218993091.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7933314 + ... + 7933337.

It is an arithmetic number, because the mean of its divisors is an integer number (37022188).

Almost surely, 2^190399812 is an apocalyptic number.

190399812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

190399812 is an abundant number, since it is smaller than the sum of its proper divisors (253866444).

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

190399812 is a wasteful number, since it uses less digits than its factorization.

190399812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15866658 (or 15866656 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 190399812 is about 13798.5438362169. The cubic root of 190399812 is about 575.2926671422.

The spelling of 190399812 in words is "one hundred ninety million, three hundred ninety-nine thousand, eight hundred twelve".