16004390 has 16 divisors (see below), whose sum is σ = 28972080. Its totient is φ = 6365280.

The previous prime is 16004383. The next prime is 16004411. The reversal of 16004390 is 9340061.

16004390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16004390² = 512280998544200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2681 + ... + 6260.

It is an arithmetic number, because the mean of its divisors is an integer number (1810755).

Almost surely, 2^16004390 is an apocalyptic number.

16004390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16004390 is a deficient number, since it is larger than the sum of its proper divisors (12967690).

16004390 is a wasteful number, since it uses less digits than its factorization.

16004390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9127.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 16004390 is about 4000.5487123643. The cubic root of 16004390 is about 252.0072539274.

The spelling of 16004390 in words is "sixteen million, four thousand, three hundred ninety".