1113865040 has 80 divisors (see below), whose sum is σ = 2690827776. Its totient is φ = 428467200.

The previous prime is 1113865037. The next prime is 1113865043. The reversal of 1113865040 is 405683111.

It is an interprime number because it is at equal distance from previous prime (1113865037) and next prime (1113865043).

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1113864994 and 1113865012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113865043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230489 + ... + 235271.

Almost surely, 2^1113865040 is an apocalyptic number.

1113865040 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 1113865040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345413888).

1113865040 is an abundant number, since it is smaller than the sum of its proper divisors (1576962736).

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

1113865040 is a wasteful number, since it uses less digits than its factorization.

1113865040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908 (or 4902 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1113865040 is about 33374.6167019188. The cubic root of 1113865040 is about 1036.5991723903.

The spelling of 1113865040 in words is "one billion, one hundred thirteen million, eight hundred sixty-five thousand, forty".