199718490 has 16 divisors (see below), whose sum is σ = 479324448. Its totient is φ = 53258256.

The previous prime is 199718479. The next prime is 199718507. The reversal of 199718490 is 94817991.

199718490 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 7 ways as a sum of consecutive naturals, for example, 3328612 + ... + 3328671.

It is an arithmetic number, because the mean of its divisors is an integer number (29957778).

Almost surely, 2^199718490 is an apocalyptic number.

199718490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199718490 is an abundant number, since it is smaller than the sum of its proper divisors (279605958).

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

199718490 is a wasteful number, since it uses less digits than its factorization.

199718490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6657293.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 199718490 is about 14132.1792374708. The cubic root of 199718490 is about 584.5290387294.

The spelling of 199718490 in words is "one hundred ninety-nine million, seven hundred eighteen thousand, four hundred ninety".