312199890 has 32 divisors (see below), whose sum is σ = 749770560. Its totient is φ = 83198784.

The previous prime is 312199889. The next prime is 312199913. The reversal of 312199890 is 98991213.

312199890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67017 + ... + 71523.

It is an arithmetic number, because the mean of its divisors is an integer number (23430330).

Almost surely, 2^312199890 is an apocalyptic number.

312199890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312199890 is an abundant number, since it is smaller than the sum of its proper divisors (437570670).

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

312199890 is a wasteful number, since it uses less digits than its factorization.

312199890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6826.

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

The square root of 312199890 is about 17669.1790980792. The cubic root of 312199890 is about 678.3871015393.

The spelling of 312199890 in words is "three hundred twelve million, one hundred ninety-nine thousand, eight hundred ninety".