199744440 has 64 divisors (see below), whose sum is σ = 684840960. Its totient is φ = 45655680.

The previous prime is 199744429. The next prime is 199744453. The reversal of 199744440 is 44447991.

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

It is a junction number, because it is equal to n+sod(n) for n = 199744392 and 199744401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118056 + ... + 119735.

It is an arithmetic number, because the mean of its divisors is an integer number (10700640).

Almost surely, 2^199744440 is an apocalyptic number.

199744440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199744440 is an abundant number, since it is smaller than the sum of its proper divisors (485096520).

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

199744440 is a wasteful number, since it uses less digits than its factorization.

199744440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237812 (or 237808 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 199744440 is about 14133.0973250735. The cubic root of 199744440 is about 584.5543541482.

The spelling of 199744440 in words is "one hundred ninety-nine million, seven hundred forty-four thousand, four hundred forty".