16406291 has 16 divisors (see below), whose sum is σ = 19664640. Its totient is φ = 13511520.

The previous prime is 16406287. The next prime is 16406297. The reversal of 16406291 is 19260461.

It is not a de Polignac number, because 16406291 - 2² = 16406287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16406297) 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, 3101 + ... + 6513.

It is an arithmetic number, because the mean of its divisors is an integer number (1229040).

Almost surely, 2^16406291 is an apocalyptic number.

16406291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16406291 is a deficient number, since it is larger than the sum of its proper divisors (3258349).

16406291 is a wasteful number, since it uses less digits than its factorization.

16406291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 16406291 is about 4050.4679976516. The cubic root of 16406291 is about 254.0993008721.

The spelling of 16406291 in words is "sixteen million, four hundred six thousand, two hundred ninety-one".