199449520 has 40 divisors (see below), whose sum is σ = 467845056. Its totient is φ = 79070208.

The previous prime is 199449493. The next prime is 199449533. The reversal of 199449520 is 25944991.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×199449520² = 79560222056460800, which contains 22 as substring.

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, 1992 + ... + 20071.

Almost surely, 2^199449520 is an apocalyptic number.

199449520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199449520 is an abundant number, since it is smaller than the sum of its proper divisors (268395536).

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

199449520 is a wasteful number, since it uses less digits than its factorization.

199449520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22189 (or 22183 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 199449520 is about 14122.6598061413. The cubic root of 199449520 is about 584.2665168715.

The spelling of 199449520 in words is "one hundred ninety-nine million, four hundred forty-nine thousand, five hundred twenty".