1081420780 has 24 divisors (see below), whose sum is σ = 2477437200. Its totient is φ = 393243840.

The previous prime is 1081420763. The next prime is 1081420789. The reversal of 1081420780 is 870241801.

It is not an unprimeable number, because it can be changed into a prime (1081420789) 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, 2457555 + ... + 2457994.

It is an arithmetic number, because the mean of its divisors is an integer number (103226550).

Almost surely, 2^1081420780 is an apocalyptic number.

1081420780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081420780 is an abundant number, since it is smaller than the sum of its proper divisors (1396016420).

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

1081420780 is a wasteful number, since it uses less digits than its factorization.

1081420780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915569 (or 4915567 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 1081420780 is about 32884.9628249752. The cubic root of 1081420780 is about 1026.4352781982.

The spelling of 1081420780 in words is "one billion, eighty-one million, four hundred twenty thousand, seven hundred eighty".