16400907 has 16 divisors (see below), whose sum is σ = 24494080. Its totient is φ = 10845576.

The previous prime is 16400851. The next prime is 16400927. The reversal of 16400907 is 70900461.

It is not a de Polignac number, because 16400907 - 2¹¹ = 16398859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16400927) 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 15 ways as a sum of consecutive naturals, for example, 1038 + ... + 5820.

It is an arithmetic number, because the mean of its divisors is an integer number (1530880).

Almost surely, 2^16400907 is an apocalyptic number.

16400907 is a deficient number, since it is larger than the sum of its proper divisors (8093173).

16400907 is a wasteful number, since it uses less digits than its factorization.

16400907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919 (or 4913 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 16400907 is about 4049.8033285581. The cubic root of 16400907 is about 254.0715021796.

The spelling of 16400907 in words is "sixteen million, four hundred thousand, nine hundred seven".