15797649 has 12 divisors (see below), whose sum is σ = 24502704. Its totient is φ = 9027144.

The previous prime is 15797647. The next prime is 15797653. The reversal of 15797649 is 94679751.

15797649 = 352² + 353² + ... + 449².

It is a happy number.

It is not a de Polignac number, because 15797649 - 2¹ = 15797647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15797598 and 15797607.

It is not an unprimeable number, because it can be changed into a prime (15797647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53587 + ... + 53880.

It is an arithmetic number, because the mean of its divisors is an integer number (2041892).

Almost surely, 2^15797649 is an apocalyptic number.

It is an amenable number.

15797649 is a deficient number, since it is larger than the sum of its proper divisors (8705055).

15797649 is a wasteful number, since it uses less digits than its factorization.

15797649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107484 (or 107477 counting only the distinct ones).

The product of its digits is 476280, while the sum is 48.

The square root of 15797649 is about 3974.6256427493. The cubic root of 15797649 is about 250.9174238821.

The spelling of 15797649 in words is "fifteen million, seven hundred ninety-seven thousand, six hundred forty-nine".