781113540 has 96 divisors (see below), whose sum is σ = 2232607104. Its totient is φ = 203996160.

The previous prime is 781113499. The next prime is 781113547. The reversal of 781113540 is 45311187.

781113540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×781113540² = 1220276724742663200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 781113498 and 781113507.

It is not an unprimeable number, because it can be changed into a prime (781113547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1672387 + ... + 1672853.

It is an arithmetic number, because the mean of its divisors is an integer number (23256324).

Almost surely, 2^781113540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781113540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116303552).

781113540 is an abundant number, since it is smaller than the sum of its proper divisors (1451493564).

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

781113540 is a wasteful number, since it uses less digits than its factorization.

781113540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 781113540 is about 27948.4085414537. The cubic root of 781113540 is about 920.9542477576.

The spelling of 781113540 in words is "seven hundred eighty-one million, one hundred thirteen thousand, five hundred forty".