1115709840 has 480 divisors, whose sum is σ = 4563326976. Its totient is φ = 238878720.

The previous prime is 1115709823. The next prime is 1115709841. The reversal of 1115709840 is 489075111.

1115709840 is a `hidden beast` number, since 1 + 1 + 1 + 570 + 9 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1115709795 and 1115709804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115709841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5780784 + ... + 5780976.

Almost surely, 2^1115709840 is an apocalyptic number.

1115709840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115709840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2281663488).

1115709840 is an abundant number, since it is smaller than the sum of its proper divisors (3447617136).

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

1115709840 is a wasteful number, since it uses less digits than its factorization.

1115709840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 1115709840 is about 33402.2430384548. The cubic root of 1115709840 is about 1037.1711337795.

The spelling of 1115709840 in words is "one billion, one hundred fifteen million, seven hundred nine thousand, eight hundred forty".