13402320 has 40 divisors (see below), whose sum is σ = 41547936. Its totient is φ = 3573888.

The previous prime is 13402309. The next prime is 13402327. The reversal of 13402320 is 2320431.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 13402320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402327) 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, 27682 + ... + 28161.

Almost surely, 2^13402320 is an apocalyptic number.

13402320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13402320 is an abundant number, since it is smaller than the sum of its proper divisors (28145616).

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

13402320 is a wasteful number, since it uses less digits than its factorization.

13402320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55859 (or 55853 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 13402320 is about 3660.9179176813. The cubic root of 13402320 is about 237.5344806817.

Adding to 13402320 its reverse (2320431), we get a palindrome (15722751).

The spelling of 13402320 in words is "thirteen million, four hundred two thousand, three hundred twenty".