13420988 has 48 divisors (see below), whose sum is σ = 28030464. Its totient is φ = 5503680.

The previous prime is 13420987. The next prime is 13420999. The reversal of 13420988 is 88902431.

It is a happy number.

It is a super-2 number, since 2×13420988² = 360245837792288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420987) 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 15 ways as a sum of consecutive naturals, for example, 85406 + ... + 85562.

It is an arithmetic number, because the mean of its divisors is an integer number (583968).

Almost surely, 2^13420988 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 13420988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14015232).

13420988 is an abundant number, since it is smaller than the sum of its proper divisors (14609476).

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

13420988 is a wasteful number, since it uses less digits than its factorization.

13420988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 13420988 is about 3663.4666642403. The cubic root of 13420988 is about 237.6447162341.

The spelling of 13420988 in words is "thirteen million, four hundred twenty thousand, nine hundred eighty-eight".