16630393 has 8 divisors (see below), whose sum is σ = 18248328. Its totient is φ = 15060864.

The previous prime is 16630391. The next prime is 16630399. The reversal of 16630393 is 39303661.

It can be written as a sum of positive squares in 4 ways, for example, as 2732409 + 13897984 = 1653^2 + 3728^2 .

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

It is not a de Polignac number, because 16630393 - 2¹ = 16630391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16630391) 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, 11380 + ... + 12757.

It is an arithmetic number, because the mean of its divisors is an integer number (2281041).

Almost surely, 2^16630393 is an apocalyptic number.

16630393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16630393 is a deficient number, since it is larger than the sum of its proper divisors (1617935).

16630393 is a wasteful number, since it uses less digits than its factorization.

16630393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24203.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 16630393 is about 4078.0378860427. The cubic root of 16630393 is about 255.2510305098.

The spelling of 16630393 in words is "sixteen million, six hundred thirty thousand, three hundred ninety-three".