199216890 has 48 divisors (see below), whose sum is σ = 518661000. Its totient is φ = 53053056.

The previous prime is 199216889. The next prime is 199216903. The reversal of 199216890 is 98612991.

It can be written as a sum of positive squares in 4 ways, for example, as 95238081 + 103978809 = 9759^2 + 10197^2 .

It is a super-2 number, since 2×199216890² = 79374738522544200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127836 + ... + 129384.

Almost surely, 2^199216890 is an apocalyptic number.

199216890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199216890 is an abundant number, since it is smaller than the sum of its proper divisors (319444110).

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

199216890 is a wasteful number, since it uses less digits than its factorization.

199216890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 199216890 is about 14114.4213483940. The cubic root of 199216890 is about 584.0392734113.

The spelling of 199216890 in words is "one hundred ninety-nine million, two hundred sixteen thousand, eight hundred ninety".