199621080 has 48 divisors (see below), whose sum is σ = 648769680. Its totient is φ = 53232192.

The previous prime is 199621069. The next prime is 199621091. The reversal of 199621080 is 80126991.

It is an interprime number because it is at equal distance from previous prime (199621069) and next prime (199621091).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276892 + ... + 277611.

It is an arithmetic number, because the mean of its divisors is an integer number (13516035).

Almost surely, 2^199621080 is an apocalyptic number.

199621080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199621080 is an abundant number, since it is smaller than the sum of its proper divisors (449148600).

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

199621080 is a wasteful number, since it uses less digits than its factorization.

199621080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554520 (or 554513 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 199621080 is about 14128.7324272208. The cubic root of 199621080 is about 584.4339912232.

The spelling of 199621080 in words is "one hundred ninety-nine million, six hundred twenty-one thousand, eighty".