13920808 has 48 divisors (see below), whose sum is σ = 29230740. Its totient is φ = 6209280.

The previous prime is 13920799. The next prime is 13920811. The reversal of 13920808 is 80802931.

It can be written as a sum of positive squares in 2 ways, for example, as 12236004 + 1684804 = 3498^2 + 1298^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13920808.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70566 + ... + 70762.

Almost surely, 2^13920808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13920808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14615370).

13920808 is an abundant number, since it is smaller than the sum of its proper divisors (15309932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13920808 is a wasteful number, since it uses less digits than its factorization.

13920808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 13920808 is about 3731.0599030302. The cubic root of 13920808 is about 240.5589287985.

The spelling of 13920808 in words is "thirteen million, nine hundred twenty thousand, eight hundred eight".