199989370 has 64 divisors (see below), whose sum is σ = 443252736. Its totient is φ = 63455040.

The previous prime is 199989367. The next prime is 199989373. The reversal of 199989370 is 73989991.

It is an interprime number because it is at equal distance from previous prime (199989367) and next prime (199989373).

It is a super-2 number, since 2×199989370² = 79991496225993800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199989373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47907 + ... + 51913.

It is an arithmetic number, because the mean of its divisors is an integer number (6925824).

Almost surely, 2^199989370 is an apocalyptic number.

199989370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199989370 is an abundant number, since it is smaller than the sum of its proper divisors (243263366).

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

199989370 is a wasteful number, since it uses less digits than its factorization.

199989370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 199989370 is about 14141.7597914828. The cubic root of 199989370 is about 584.7931866895.

The spelling of 199989370 in words is "one hundred ninety-nine million, nine hundred eighty-nine thousand, three hundred seventy".