13620408 has 32 divisors (see below), whose sum is σ = 35151360. Its totient is φ = 4393440.

The previous prime is 13620407. The next prime is 13620421. The reversal of 13620408 is 80402631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620407) 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, 8410 + ... + 9897.

It is an arithmetic number, because the mean of its divisors is an integer number (1098480).

Almost surely, 2^13620408 is an apocalyptic number.

It is an amenable number.

13620408 is an abundant number, since it is smaller than the sum of its proper divisors (21530952).

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

13620408 is a wasteful number, since it uses less digits than its factorization.

13620408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18347 (or 18343 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 13620408 is about 3690.5836936723. The cubic root of 13620408 is about 238.8159738367.

It can be divided in two parts, 13620 and 408, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13620408 in words is "thirteen million, six hundred twenty thousand, four hundred eight".