13670816 has 12 divisors (see below), whose sum is σ = 26914482. Its totient is φ = 6835392.

The previous prime is 13670801. The next prime is 13670821. The reversal of 13670816 is 61807631.

It can be written as a sum of positive squares in only one way, i.e., 12931216 + 739600 = 3596^2 + 860^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 427213 = 13670816 / (1 + 3 + 6 + 7 + 0 + 8 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213575 + ... + 213638.

Almost surely, 2^13670816 is an apocalyptic number.

13670816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13670816 is a deficient number, since it is larger than the sum of its proper divisors (13243666).

13670816 is an equidigital number, since it uses as much as digits as its factorization.

13670816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427223 (or 427215 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13670816 is about 3697.4066587272. The cubic root of 13670816 is about 239.1102238384.

The spelling of 13670816 in words is "thirteen million, six hundred seventy thousand, eight hundred sixteen".