16402389 has 8 divisors (see below), whose sum is σ = 22335360. Its totient is φ = 10702176.

The previous prime is 16402369. The next prime is 16402391. The reversal of 16402389 is 98320461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16402389 - 2¹⁷ = 16271317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16402369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58024 + ... + 58305.

It is an arithmetic number, because the mean of its divisors is an integer number (2791920).

Almost surely, 2^16402389 is an apocalyptic number.

It is an amenable number.

16402389 is a deficient number, since it is larger than the sum of its proper divisors (5932971).

16402389 is a wasteful number, since it uses less digits than its factorization.

16402389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116379.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 16402389 is about 4049.9862962731. The cubic root of 16402389 is about 254.0791546553.

The spelling of 16402389 in words is "sixteen million, four hundred two thousand, three hundred eighty-nine".