16247649 has 16 divisors (see below), whose sum is σ = 23855040. Its totient is φ = 9754560.

The previous prime is 16247639. The next prime is 16247657. The reversal of 16247649 is 94674261.

It is a happy number.

It is not a de Polignac number, because 16247649 - 2¹² = 16243553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16247639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339 + ... + 5855.

It is an arithmetic number, because the mean of its divisors is an integer number (1490940).

Almost surely, 2^16247649 is an apocalyptic number.

It is an amenable number.

16247649 is a deficient number, since it is larger than the sum of its proper divisors (7607391).

16247649 is a wasteful number, since it uses less digits than its factorization.

16247649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640.

The product of its digits is 72576, while the sum is 39.

The square root of 16247649 is about 4030.8372579403. The cubic root of 16247649 is about 253.2776353005.

The spelling of 16247649 in words is "sixteen million, two hundred forty-seven thousand, six hundred forty-nine".