16009857 has 12 divisors (see below), whose sum is σ = 23871744. Its totient is φ = 10328760.

The previous prime is 16009853. The next prime is 16009879. The reversal of 16009857 is 75890061.

It is not a de Polignac number, because 16009857 - 2² = 16009853 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16009853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28413 + ... + 28970.

It is an arithmetic number, because the mean of its divisors is an integer number (1989312).

Almost surely, 2^16009857 is an apocalyptic number.

It is an amenable number.

16009857 is a deficient number, since it is larger than the sum of its proper divisors (7861887).

16009857 is a wasteful number, since it uses less digits than its factorization.

16009857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57420 (or 57417 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 16009857 is about 4001.2319352919. The cubic root of 16009857 is about 252.0359453638.

The spelling of 16009857 in words is "sixteen million, nine thousand, eight hundred fifty-seven".