199044420 has 96 divisors (see below), whose sum is σ = 574801920. Its totient is φ = 51434880.

The previous prime is 199044409. The next prime is 199044431. The reversal of 199044420 is 24440991.

It is an interprime number because it is at equal distance from previous prime (199044409) and next prime (199044431).

It is a super-2 number, since 2×199044420² = 79237362266272800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 461605 + ... + 462035.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^199044420 is an apocalyptic number.

199044420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199044420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287400960).

199044420 is an abundant number, since it is smaller than the sum of its proper divisors (375757500).

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

199044420 is a wasteful number, since it uses less digits than its factorization.

199044420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 199044420 is about 14108.3103169728. The cubic root of 199044420 is about 583.8706827261.

The spelling of 199044420 in words is "one hundred ninety-nine million, forty-four thousand, four hundred twenty".