1011868812 has 72 divisors (see below), whose sum is σ = 2656290000. Its totient is φ = 324390528.

The previous prime is 1011868811. The next prime is 1011868843. The reversal of 1011868812 is 2188681101.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1011868811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287439 + ... + 290937.

Almost surely, 2^1011868812 is an apocalyptic number.

1011868812 is a gapful number since it is divisible by the number (12) 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 1011868812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328145000).

1011868812 is an abundant number, since it is smaller than the sum of its proper divisors (1644421188).

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

1011868812 is a wasteful number, since it uses less digits than its factorization.

1011868812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815 (or 3810 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 36.

The square root of 1011868812 is about 31809.8854446224. The cubic root of 1011868812 is about 1003.9407209859.

The spelling of 1011868812 in words is "one billion, eleven million, eight hundred sixty-eight thousand, eight hundred twelve".