16249649 has 8 divisors (see below), whose sum is σ = 17554152. Its totient is φ = 14952960.

The previous prime is 16249643. The next prime is 16249669. The reversal of 16249649 is 94694261.

It can be written as a sum of positive squares in 4 ways, for example, as 193600 + 16056049 = 440^2 + 4007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16249649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16249643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2819 + ... + 6359.

It is an arithmetic number, because the mean of its divisors is an integer number (2194269).

Almost surely, 2^16249649 is an apocalyptic number.

It is an amenable number.

16249649 is a deficient number, since it is larger than the sum of its proper divisors (1304503).

16249649 is a wasteful number, since it uses less digits than its factorization.

16249649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907.

The product of its digits is 93312, while the sum is 41.

The square root of 16249649 is about 4031.0853377223. The cubic root of 16249649 is about 253.2880272550.

The spelling of 16249649 in words is "sixteen million, two hundred forty-nine thousand, six hundred forty-nine".