1139780 has 12 divisors (see below), whose sum is σ = 2393580. Its totient is φ = 455904.

The previous prime is 1139779. The next prime is 1139807. The reversal of 1139780 is 879311.

It can be written as a sum of positive squares in 2 ways, for example, as 732736 + 407044 = 856^2 + 638^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28475 + ... + 28514.

It is an arithmetic number, because the mean of its divisors is an integer number (199465).

2^1139780 is an apocalyptic number.

1139780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1139780 is an abundant number, since it is smaller than the sum of its proper divisors (1253800).

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

1139780 is a wasteful number, since it uses less digits than its factorization.

1139780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56998 (or 56996 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1139780 is about 1067.6047957929. The cubic root of 1139780 is about 104.4576723182.

It can be divided in two parts, 11 and 39780, that multiplied together give a triangular number (437580 = T₉₃₅).

The spelling of 1139780 in words is "one million, one hundred thirty-nine thousand, seven hundred eighty".