199161440 has 24 divisors (see below), whose sum is σ = 470519280. Its totient is φ = 79664512.

The previous prime is 199161437. The next prime is 199161463. The reversal of 199161440 is 44161991.

It is a self number, because there is not a number n which added to its sum of digits gives 199161440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622220 + ... + 622539.

It is an arithmetic number, because the mean of its divisors is an integer number (19604970).

Almost surely, 2^199161440 is an apocalyptic number.

199161440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199161440 is an abundant number, since it is smaller than the sum of its proper divisors (271357840).

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

199161440 is a wasteful number, since it uses less digits than its factorization.

199161440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244774 (or 1244766 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 199161440 is about 14112.4569087030. The cubic root of 199161440 is about 583.9850812477.

The spelling of 199161440 in words is "one hundred ninety-nine million, one hundred sixty-one thousand, four hundred forty".