16389902 has 4 divisors (see below), whose sum is σ = 24584856. Its totient is φ = 8194950.

The previous prime is 16389899. The next prime is 16389929. The reversal of 16389902 is 20998361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20998361 = 617 ⋅34033.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4097474 + ... + 4097477.

It is an arithmetic number, because the mean of its divisors is an integer number (6146214).

Almost surely, 2^16389902 is an apocalyptic number.

16389902 is a deficient number, since it is larger than the sum of its proper divisors (8194954).

16389902 is an equidigital number, since it uses as much as digits as its factorization.

16389902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194953.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 16389902 is about 4048.4443926032. Note that the first 3 decimals coincide. The cubic root of 16389902 is about 254.0146621829.

The spelling of 16389902 in words is "sixteen million, three hundred eighty-nine thousand, nine hundred two".