16400372 has 24 divisors (see below), whose sum is σ = 29701056. Its totient is φ = 7918848.

The previous prime is 16400347. The next prime is 16400383. The reversal of 16400372 is 27300461.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16193 + ... + 17175.

It is an arithmetic number, because the mean of its divisors is an integer number (1237544).

Almost surely, 2^16400372 is an apocalyptic number.

It is an amenable number.

16400372 is a deficient number, since it is larger than the sum of its proper divisors (13300684).

16400372 is a wasteful number, since it uses less digits than its factorization.

16400372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 16400372 is about 4049.7372754291. The cubic root of 16400372 is about 254.0687395330.

The spelling of 16400372 in words is "sixteen million, four hundred thousand, three hundred seventy-two".