1138780 has 24 divisors (see below), whose sum is σ = 2420208. Its totient is φ = 450048.

The previous prime is 1138777. The next prime is 1138793. The reversal of 1138780 is 878311.

It is a happy number.

It is a congruent number.

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, 1647 + ... + 2233.

It is an arithmetic number, because the mean of its divisors is an integer number (100842).

2^1138780 is an apocalyptic number.

1138780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138780 is an abundant number, since it is smaller than the sum of its proper divisors (1281428).

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

1138780 is a wasteful number, since it uses less digits than its factorization.

1138780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 691 counting only the distinct ones).

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

The square root of 1138780 is about 1067.1363549238. The cubic root of 1138780 is about 104.4271143052.

The spelling of 1138780 in words is "one million, one hundred thirty-eight thousand, seven hundred eighty".