16394381 has 8 divisors (see below), whose sum is σ = 16972800. Its totient is φ = 15819120.

The previous prime is 16394353. The next prime is 16394387. The reversal of 16394381 is 18349361.

16394381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16394381 - 2¹⁴ = 16377997 is a prime.

It is a super-2 number, since 2×16394381² = 537551456746322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16394387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15260 + ... + 16298.

It is an arithmetic number, because the mean of its divisors is an integer number (2121600).

Almost surely, 2^16394381 is an apocalyptic number.

It is an amenable number.

16394381 is a deficient number, since it is larger than the sum of its proper divisors (578419).

16394381 is a wasteful number, since it uses less digits than its factorization.

16394381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579.

The product of its digits is 15552, while the sum is 35.

The square root of 16394381 is about 4048.9975302536. The cubic root of 16394381 is about 254.0377989503.

The spelling of 16394381 in words is "sixteen million, three hundred ninety-four thousand, three hundred eighty-one".