13480820 has 18 divisors (see below), whose sum is σ = 28344246. Its totient is φ = 5385760.

The previous prime is 13480807. The next prime is 13480843. The reversal of 13480820 is 2808431.

It can be written as a sum of positive squares in 3 ways, for example, as 99856 + 13380964 = 316^2 + 3658^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13480820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16010 + ... + 16830.

Almost surely, 2^13480820 is an apocalyptic number.

13480820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13480820 is an abundant number, since it is smaller than the sum of its proper divisors (14863426).

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

13480820 is an frugal number, since it uses more digits than its factorization.

13480820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 13480820 is about 3671.6236190547. The cubic root of 13480820 is about 237.9973400828.

The spelling of 13480820 in words is "thirteen million, four hundred eighty thousand, eight hundred twenty".