16400371 has 4 divisors (see below), whose sum is σ = 17661952. Its totient is φ = 15138792.

The previous prime is 16400347. The next prime is 16400383. The reversal of 16400371 is 17300461.

16400371 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16400371 - 2¹¹ = 16398323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16410371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630771 + ... + 630796.

It is an arithmetic number, because the mean of its divisors is an integer number (4415488).

Almost surely, 2^16400371 is an apocalyptic number.

16400371 is a deficient number, since it is larger than the sum of its proper divisors (1261581).

16400371 is a wasteful number, since it uses less digits than its factorization.

16400371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261580.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 16400371 is about 4049.7371519643. The cubic root of 16400371 is about 254.0687343691.

The spelling of 16400371 in words is "sixteen million, four hundred thousand, three hundred seventy-one".