1113631036 has 72 divisors (see below), whose sum is σ = 2410911216. Its totient is φ = 447229440.

The previous prime is 1113631033. The next prime is 1113631049. The reversal of 1113631036 is 6301363111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1113631036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113631031) 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, 942366 + ... + 943546.

It is an arithmetic number, because the mean of its divisors is an integer number (33484878).

Almost surely, 2^1113631036 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 1113631036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205455608).

1113631036 is an abundant number, since it is smaller than the sum of its proper divisors (1297280180).

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

1113631036 is a wasteful number, since it uses less digits than its factorization.

1113631036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1490 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1113631036 is about 33371.1107996123. The cubic root of 1113631036 is about 1036.5265767189.

Adding to 1113631036 its reverse (6301363111), we get a palindrome (7414994147).

The spelling of 1113631036 in words is "one billion, one hundred thirteen million, six hundred thirty-one thousand, thirty-six".