15944049 has 21 divisors (see below), whose sum is σ = 25333321. Its totient is φ = 9663060.

The previous prime is 15944029. The next prime is 15944053. The reversal of 15944049 is 94044951.

It is a happy number.

The square root of 15944049 is 3993.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 15944049 - 2¹¹ = 15942001 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (15944009) by changing a digit.

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 20 ways as a sum of consecutive naturals, for example, 1449454 + ... + 1449464.

Almost surely, 2^15944049 is an apocalyptic number.

15944049 is the 3993-rd square number.

15944049 is the 1997-th centered octagonal number.

It is an amenable number.

15944049 is a deficient number, since it is larger than the sum of its proper divisors (9389272).

15944049 is an frugal number, since it uses more digits than its factorization.

15944049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 14 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 15944049 is about 251.6901425893.

Multiplying 15944049 by its sum of digits (36), we get a square (573985764 = 23958²).

The spelling of 15944049 in words is "fifteen million, nine hundred forty-four thousand, forty-nine".