16389788 has 6 divisors (see below), whose sum is σ = 28682136. Its totient is φ = 8194892.

The previous prime is 16389757. The next prime is 16389797. The reversal of 16389788 is 88798361.

It is a happy number.

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, 2048720 + ... + 2048727.

It is an arithmetic number, because the mean of its divisors is an integer number (4780356).

Almost surely, 2^16389788 is an apocalyptic number.

It is an amenable number.

16389788 is a deficient number, since it is larger than the sum of its proper divisors (12292348).

16389788 is a wasteful number, since it uses less digits than its factorization.

16389788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097451 (or 4097449 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 16389788 is about 4048.4303130967. The cubic root of 16389788 is about 254.0140732484.

The spelling of 16389788 in words is "sixteen million, three hundred eighty-nine thousand, seven hundred eighty-eight".