1011085940 has 12 divisors (see below), whose sum is σ = 2123280516. Its totient is φ = 404434368.

The previous prime is 1011085849. The next prime is 1011085991. The reversal of 1011085940 is 495801101.

It can be written as a sum of positive squares in 2 ways, for example, as 574944484 + 436141456 = 23978^2 + 20884^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25277129 + ... + 25277168.

It is an arithmetic number, because the mean of its divisors is an integer number (176940043).

Almost surely, 2^1011085940 is an apocalyptic number.

1011085940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011085940 is an abundant number, since it is smaller than the sum of its proper divisors (1112194576).

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

1011085940 is a wasteful number, since it uses less digits than its factorization.

1011085940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50554306 (or 50554304 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1011085940 is about 31797.5775806900. The cubic root of 1011085940 is about 1003.6817414774.

The spelling of 1011085940 in words is "one billion, eleven million, eighty-five thousand, nine hundred forty".