1031161780 has 24 divisors (see below), whose sum is σ = 2362298400. Its totient is φ = 374967840.

The previous prime is 1031161777. The next prime is 1031161819. The reversal of 1031161780 is 871611301.

1031161780 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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, 2343330 + ... + 2343769.

It is an arithmetic number, because the mean of its divisors is an integer number (98429100).

Almost surely, 2^1031161780 is an apocalyptic number.

1031161780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031161780 is an abundant number, since it is smaller than the sum of its proper divisors (1331136620).

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

1031161780 is a wasteful number, since it uses less digits than its factorization.

1031161780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687119 (or 4687117 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1031161780 is about 32111.7078337481. The cubic root of 1031161780 is about 1010.2811947829.

The spelling of 1031161780 in words is "one billion, thirty-one million, one hundred sixty-one thousand, seven hundred eighty".