16628413 has 4 divisors (see below), whose sum is σ = 16862688. Its totient is φ = 16394140.

The previous prime is 16628399. The next prime is 16628461. The reversal of 16628413 is 31482661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16628413 - 2⁹ = 16627901 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 (16628813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117031 + ... + 117172.

It is an arithmetic number, because the mean of its divisors is an integer number (4215672).

Almost surely, 2^16628413 is an apocalyptic number.

It is an amenable number.

16628413 is a deficient number, since it is larger than the sum of its proper divisors (234275).

16628413 is an equidigital number, since it uses as much as digits as its factorization.

16628413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234274.

The product of its digits is 6912, while the sum is 31.

The square root of 16628413 is about 4077.7951150101. The cubic root of 16628413 is about 255.2409001198.

The spelling of 16628413 in words is "sixteen million, six hundred twenty-eight thousand, four hundred thirteen".