1318780 has 24 divisors (see below), whose sum is σ = 2791152. Its totient is φ = 523392.

The previous prime is 1318753. The next prime is 1318781. The reversal of 1318780 is 878131.

It is a happy number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318781) 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, 4519 + ... + 4801.

It is an arithmetic number, because the mean of its divisors is an integer number (116298).

2^1318780 is an apocalyptic number.

1318780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1318780 is an abundant number, since it is smaller than the sum of its proper divisors (1472372).

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

1318780 is a wasteful number, since it uses less digits than its factorization.

1318780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1318780 is about 1148.3814697216. The cubic root of 1318780 is about 109.6623253589.

It can be divided in two parts, 131 and 8780, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 1318780 in words is "one million, three hundred eighteen thousand, seven hundred eighty".