16426399 has 8 divisors (see below), whose sum is σ = 18000720. Its totient is φ = 14865600.

The previous prime is 16426381. The next prime is 16426411. The reversal of 16426399 is 99362461.

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 16426399 - 2²¹ = 14329247 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 (16426309) 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, 742 + ... + 5779.

It is an arithmetic number, because the mean of its divisors is an integer number (2250090).

Almost surely, 2^16426399 is an apocalyptic number.

16426399 is a deficient number, since it is larger than the sum of its proper divisors (1574321).

16426399 is a wasteful number, since it uses less digits than its factorization.

16426399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761.

The product of its digits is 69984, while the sum is 40.

The square root of 16426399 is about 4052.9494198670. The cubic root of 16426399 is about 254.2030688463.

The spelling of 16426399 in words is "sixteen million, four hundred twenty-six thousand, three hundred ninety-nine".