13870811 has 8 divisors (see below), whose sum is σ = 14287680. Its totient is φ = 13458312.

The previous prime is 13870807. The next prime is 13870837. The reversal of 13870811 is 11807831.

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

It is not a de Polignac number, because 13870811 - 2² = 13870807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13870891) 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, 6020 + ... + 7998.

It is an arithmetic number, because the mean of its divisors is an integer number (1785960).

Almost surely, 2^13870811 is an apocalyptic number.

13870811 is a deficient number, since it is larger than the sum of its proper divisors (416869).

13870811 is a wasteful number, since it uses less digits than its factorization.

13870811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 13870811 is about 3724.3537694478. The cubic root of 13870811 is about 240.2705917931.

The spelling of 13870811 in words is "thirteen million, eight hundred seventy thousand, eight hundred eleven".