1180985780 has 24 divisors (see below), whose sum is σ = 2670845352. Its totient is φ = 436056192.

The previous prime is 1180985759. The next prime is 1180985797. The reversal of 1180985780 is 875890811.

It can be written as a sum of positive squares in 4 ways, for example, as 123565456 + 1057420324 = 11116^2 + 32518^2 .

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, 2270867 + ... + 2271386.

It is an arithmetic number, because the mean of its divisors is an integer number (111285223).

Almost surely, 2^1180985780 is an apocalyptic number.

1180985780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1180985780 is an abundant number, since it is smaller than the sum of its proper divisors (1489859572).

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

1180985780 is a wasteful number, since it uses less digits than its factorization.

1180985780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4542275 (or 4542273 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 47.

The square root of 1180985780 is about 34365.4736618019. The cubic root of 1180985780 is about 1057.0159875401.

The spelling of 1180985780 in words is "one billion, one hundred eighty million, nine hundred eighty-five thousand, seven hundred eighty".