199439520 has 96 divisors (see below), whose sum is σ = 717994368. Its totient is φ = 45585408.

The previous prime is 199439507. The next prime is 199439543. The reversal of 199439520 is 25934991.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×199439520² = 79552244275660800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26319 + ... + 33038.

It is an arithmetic number, because the mean of its divisors is an integer number (7479108).

Almost surely, 2^199439520 is an apocalyptic number.

199439520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199439520 is an abundant number, since it is smaller than the sum of its proper divisors (518554848).

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

199439520 is a wasteful number, since it uses less digits than its factorization.

199439520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59382 (or 59374 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 199439520 is about 14122.3057607460. The cubic root of 199439520 is about 584.2567520567.

It can be divided in two parts, 1994 and 39520, that added together give a palindrome (41514).

The spelling of 199439520 in words is "one hundred ninety-nine million, four hundred thirty-nine thousand, five hundred twenty".