13402881 has 32 divisors (see below), whose sum is σ = 20889600. Its totient is φ = 8482320.

The previous prime is 13402877. The next prime is 13402889. The reversal of 13402881 is 18820431.

It is not a de Polignac number, because 13402881 - 2² = 13402877 is a prime.

It is a super-2 number, since 2×13402881² = 359274438200322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55960 + ... + 56198.

It is an arithmetic number, because the mean of its divisors is an integer number (652800).

Almost surely, 2^13402881 is an apocalyptic number.

It is an amenable number.

13402881 is a deficient number, since it is larger than the sum of its proper divisors (7486719).

13402881 is a wasteful number, since it uses less digits than its factorization.

13402881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 13402881 is about 3660.9945370077. The cubic root of 13402881 is about 237.5377949085.

The spelling of 13402881 in words is "thirteen million, four hundred two thousand, eight hundred eighty-one".