1113662720 has 36 divisors (see below), whose sum is σ = 2667573300. Its totient is φ = 445464576.

The previous prime is 1113662657. The next prime is 1113662729. The reversal of 1113662720 is 272663111.

It can be written as a sum of positive squares in 2 ways, for example, as 183656704 + 930006016 = 13552^2 + 30496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113662729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433745 + ... + 436304.

Almost surely, 2^1113662720 is an apocalyptic number.

1113662720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1113662720 is an abundant number, since it is smaller than the sum of its proper divisors (1553910580).

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

1113662720 is an frugal number, since it uses more digits than its factorization.

1113662720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870070 (or 870056 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1113662720 is about 33371.5855182219. The cubic root of 1113662720 is about 1036.5364067241.

The spelling of 1113662720 in words is "one billion, one hundred thirteen million, six hundred sixty-two thousand, seven hundred twenty".