16397433 has 24 divisors (see below), whose sum is σ = 25651080. Its totient is φ = 10033920.

The previous prime is 16397411. The next prime is 16397467. The reversal of 16397433 is 33479361.

It can be written as a sum of positive squares in 4 ways, for example, as 501264 + 15896169 = 708^2 + 3987^2 .

It is not a de Polignac number, because 16397433 - 2¹⁸ = 16135289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16397033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31213 + ... + 31733.

It is an arithmetic number, because the mean of its divisors is an integer number (1068795).

Almost surely, 2^16397433 is an apocalyptic number.

16397433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16397433 is a deficient number, since it is larger than the sum of its proper divisors (9253647).

16397433 is a wasteful number, since it uses less digits than its factorization.

16397433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 806 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 16397433 is about 4049.3743961259. The cubic root of 16397433 is about 254.0535619782.

The spelling of 16397433 in words is "sixteen million, three hundred ninety-seven thousand, four hundred thirty-three".