199400634 has 24 divisors (see below), whose sum is σ = 434901792. Its totient is φ = 66025800.

The previous prime is 199400609. The next prime is 199400647. The reversal of 199400634 is 436004991.

199400634 is a `hidden beast` number, since 19 + 9 + 4 + 0 + 0 + 634 = 666.

199400634 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×199400634² = 79521225679203912, which contains 22 as substring.

It is a Curzon 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, 33964 + ... + 39399.

It is an arithmetic number, because the mean of its divisors is an integer number (18120908).

Almost surely, 2^199400634 is an apocalyptic number.

199400634 is an abundant number, since it is smaller than the sum of its proper divisors (235501158).

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

199400634 is a wasteful number, since it uses less digits than its factorization.

199400634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73522 (or 73519 counting only the distinct ones).

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

The square root of 199400634 is about 14120.9289354490. The cubic root of 199400634 is about 584.2187774955.

The spelling of 199400634 in words is "one hundred ninety-nine million, four hundred thousand, six hundred thirty-four".