13812780 has 24 divisors (see below), whose sum is σ = 38675952. Its totient is φ = 3683392.

The previous prime is 13812767. The next prime is 13812793. The reversal of 13812780 is 8721831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13812767) and next prime (13812793).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115047 + ... + 115166.

It is an arithmetic number, because the mean of its divisors is an integer number (1611498).

Almost surely, 2^13812780 is an apocalyptic number.

13812780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13812780 is an abundant number, since it is smaller than the sum of its proper divisors (24863172).

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

13812780 is a wasteful number, since it uses less digits than its factorization.

13812780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230225 (or 230223 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13812780 is about 3716.5548563152. The cubic root of 13812780 is about 239.9350518699.

The spelling of 13812780 in words is "thirteen million, eight hundred twelve thousand, seven hundred eighty".