16140399 has 16 divisors (see below), whose sum is σ = 24113280. Its totient is φ = 9516960.

The previous prime is 16140391. The next prime is 16140403. The reversal of 16140399 is 99304161.

It is not a de Polignac number, because 16140399 - 2³ = 16140391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16140391) 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, 5389 + ... + 7830.

It is an arithmetic number, because the mean of its divisors is an integer number (1507080).

Almost surely, 2^16140399 is an apocalyptic number.

16140399 is a deficient number, since it is larger than the sum of its proper divisors (7972881).

16140399 is a wasteful number, since it uses less digits than its factorization.

16140399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13270.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 16140399 is about 4017.5115432317. The cubic root of 16140399 is about 252.7191131404.

The spelling of 16140399 in words is "sixteen million, one hundred forty thousand, three hundred ninety-nine".