13401988 has 12 divisors (see below), whose sum is σ = 23481612. Its totient is φ = 6692960.

The previous prime is 13401937. The next prime is 13401989. The reversal of 13401988 is 88910431.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5992704 + 7409284 = 2448^2 + 2722^2 .

It is a super-2 number, since 2×13401988² = 359226564704288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13401989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3306 + ... + 6142.

It is an arithmetic number, because the mean of its divisors is an integer number (1956801).

Almost surely, 2^13401988 is an apocalyptic number.

It is an amenable number.

13401988 is a deficient number, since it is larger than the sum of its proper divisors (10079624).

13401988 is a wasteful number, since it uses less digits than its factorization.

13401988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022 (or 4020 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 13401988 is about 3660.8725735813. The cubic root of 13401988 is about 237.5325192775.

The spelling of 13401988 in words is "thirteen million, four hundred one thousand, nine hundred eighty-eight".