199042388 has 24 divisors (see below), whose sum is σ = 359198952. Its totient is φ = 96436224.

The previous prime is 199042379. The next prime is 199042411. The reversal of 199042388 is 883240991.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 178810384 + 20232004 = 13372^2 + 4498^2 .

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, 35420 + ... + 40652.

It is an arithmetic number, because the mean of its divisors is an integer number (14966623).

Almost surely, 2^199042388 is an apocalyptic number.

It is an amenable number.

199042388 is a deficient number, since it is larger than the sum of its proper divisors (160156564).

199042388 is a wasteful number, since it uses less digits than its factorization.

199042388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5531 (or 5529 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 199042388 is about 14108.2383024955. The cubic root of 199042388 is about 583.8686958509.

The spelling of 199042388 in words is "one hundred ninety-nine million, forty-two thousand, three hundred eighty-eight".