1155113730 has 128 divisors (see below), whose sum is σ = 3238329600. Its totient is φ = 292626432.

The previous prime is 1155113717. The next prime is 1155113731. The reversal of 1155113730 is 373115511.

1155113730 is a `hidden beast` number, since 115 + 511 + 3 + 7 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1155113694 and 1155113703.

It is not an unprimeable number, because it can be changed into a prime (1155113731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 428226 + ... + 430914.

It is an arithmetic number, because the mean of its divisors is an integer number (25299450).

Almost surely, 2^1155113730 is an apocalyptic number.

1155113730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155113730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1619164800).

1155113730 is an abundant number, since it is smaller than the sum of its proper divisors (2083215870).

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

1155113730 is a wasteful number, since it uses less digits than its factorization.

1155113730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 27.

The square root of 1155113730 is about 33986.9641186147. The cubic root of 1155113730 is about 1049.2401849990.

It can be divided in two parts, 11551 and 13730, that added together give a square (25281 = 159²).

The spelling of 1155113730 in words is "one billion, one hundred fifty-five million, one hundred thirteen thousand, seven hundred thirty".