16400361 has 16 divisors (see below), whose sum is σ = 22785408. Its totient is φ = 10483200.

The previous prime is 16400347. The next prime is 16400383. The reversal of 16400361 is 16300461.

It is not a de Polignac number, because 16400361 - 2⁷ = 16400233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16404361) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6841 + ... + 8921.

It is an arithmetic number, because the mean of its divisors is an integer number (1424088).

Almost surely, 2^16400361 is an apocalyptic number.

It is an amenable number.

16400361 is a deficient number, since it is larger than the sum of its proper divisors (6385047).

16400361 is a wasteful number, since it uses less digits than its factorization.

16400361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 16400361 is about 4049.7359173161. The cubic root of 16400361 is about 254.0686827303.

It can be divided in two parts, 16400 and 361, that added together give a palindrome (16761).

The spelling of 16400361 in words is "sixteen million, four hundred thousand, three hundred sixty-one".