16540389 has 16 divisors (see below), whose sum is σ = 24672640. Its totient is φ = 10951200.

The previous prime is 16540387. The next prime is 16540397. The reversal of 16540389 is 98304561.

It is not a de Polignac number, because 16540389 - 2¹ = 16540387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2049 + ... + 6105.

It is an arithmetic number, because the mean of its divisors is an integer number (1542040).

Almost surely, 2^16540389 is an apocalyptic number.

It is an amenable number.

16540389 is a deficient number, since it is larger than the sum of its proper divisors (8132251).

16540389 is a wasteful number, since it uses less digits than its factorization.

16540389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217 (or 4211 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 16540389 is about 4066.9877059072. The cubic root of 16540389 is about 254.7897228435.

The spelling of 16540389 in words is "sixteen million, five hundred forty thousand, three hundred eighty-nine".