16389495 has 48 divisors (see below), whose sum is σ = 30981600. Its totient is φ = 7983360.

The previous prime is 16389491. The next prime is 16389497. The reversal of 16389495 is 59498361.

It is a happy number.

16389495 is a `hidden beast` number, since 1 + 638 + 9 + 4 + 9 + 5 = 666.

It is not a de Polignac number, because 16389495 - 2² = 16389491 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (233280) is a multiple of the sum of its prime factors (720).

It is a self number, because there is not a number n which added to its sum of digits gives 16389495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16389491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24465 + ... + 25125.

It is an arithmetic number, because the mean of its divisors is an integer number (645450).

Almost surely, 2^16389495 is an apocalyptic number.

16389495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16389495 is a deficient number, since it is larger than the sum of its proper divisors (14592105).

16389495 is a wasteful number, since it uses less digits than its factorization.

16389495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 717 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 16389495 is about 4048.3941260702. The cubic root of 16389495 is about 254.0125595707.

The spelling of 16389495 in words is "sixteen million, three hundred eighty-nine thousand, four hundred ninety-five".