199304640 has 84 divisors (see below), whose sum is σ = 685534824. Its totient is φ = 53147136.

The previous prime is 199304627. The next prime is 199304653. The reversal of 199304640 is 46403991.

199304640 is a `hidden beast` number, since 1 + 9 + 9 + 3 + 0 + 4 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (199304627) and next prime (199304653).

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

It is a junction number, because it is equal to n+sod(n) for n = 199304595 and 199304604.

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, 31722 + ... + 37481.

Almost surely, 2^199304640 is an apocalyptic number.

199304640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199304640 is an abundant number, since it is smaller than the sum of its proper divisors (486230184).

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

199304640 is a wasteful number, since it uses less digits than its factorization.

199304640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69226 (or 69213 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 199304640 is about 14117.5295289225. The cubic root of 199304640 is about 584.1250123319.

The spelling of 199304640 in words is "one hundred ninety-nine million, three hundred four thousand, six hundred forty".