199443990 has 16 divisors (see below), whose sum is σ = 478665648. Its totient is φ = 53185056.

The previous prime is 199443977. The next prime is 199444001. The reversal of 199443990 is 99344991.

199443990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 3324037 + ... + 3324096.

It is an arithmetic number, because the mean of its divisors is an integer number (29916603).

Almost surely, 2^199443990 is an apocalyptic number.

199443990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199443990 is an abundant number, since it is smaller than the sum of its proper divisors (279221658).

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

199443990 is a wasteful number, since it uses less digits than its factorization.

199443990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648143.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 199443990 is about 14122.4640201347. The cubic root of 199443990 is about 584.2611169693.

The spelling of 199443990 in words is "one hundred ninety-nine million, four hundred forty-three thousand, nine hundred ninety".