13880782 has 4 divisors (see below), whose sum is σ = 20821176. Its totient is φ = 6940390.

The previous prime is 13880767. The next prime is 13880819. The reversal of 13880782 is 28708831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28708831 = 173 ⋅165947.

It is a super-2 number, since 2×13880782² = 385352217863048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3470194 + ... + 3470197.

It is an arithmetic number, because the mean of its divisors is an integer number (5205294).

Almost surely, 2^13880782 is an apocalyptic number.

13880782 is a deficient number, since it is larger than the sum of its proper divisors (6940394).

13880782 is an equidigital number, since it uses as much as digits as its factorization.

13880782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940393.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 13880782 is about 3725.6921504601. The cubic root of 13880782 is about 240.3281506540.

The spelling of 13880782 in words is "thirteen million, eight hundred eighty thousand, seven hundred eighty-two".