199394840 has 16 divisors (see below), whose sum is σ = 448638480. Its totient is φ = 79757920.

The previous prime is 199394837. The next prime is 199394857. The reversal of 199394840 is 48493991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2492396 + ... + 2492475.

It is an arithmetic number, because the mean of its divisors is an integer number (28039905).

Almost surely, 2^199394840 is an apocalyptic number.

199394840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199394840 is an abundant number, since it is smaller than the sum of its proper divisors (249243640).

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

199394840 is a wasteful number, since it uses less digits than its factorization.

199394840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984882 (or 4984878 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 199394840 is about 14120.7237774839. The cubic root of 199394840 is about 584.2131188769.

The spelling of 199394840 in words is "one hundred ninety-nine million, three hundred ninety-four thousand, eight hundred forty".