1158292772 has 72 divisors (see below), whose sum is σ = 2547216000. Its totient is φ = 456805440.

The previous prime is 1158292771. The next prime is 1158292787. The reversal of 1158292772 is 2772928511.

It is not an unprimeable number, because it can be changed into a prime (1158292771) 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, 1270997 + ... + 1271907.

It is an arithmetic number, because the mean of its divisors is an integer number (35378000).

Almost surely, 2^1158292772 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 1158292772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1273608000).

1158292772 is an abundant number, since it is smaller than the sum of its proper divisors (1388923228).

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

1158292772 is a wasteful number, since it uses less digits than its factorization.

1158292772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441 (or 1432 counting only the distinct ones).

The product of its digits is 141120, while the sum is 44.

The square root of 1158292772 is about 34033.7005334418. The cubic root of 1158292772 is about 1050.2018574877.

The spelling of 1158292772 in words is "one billion, one hundred fifty-eight million, two hundred ninety-two thousand, seven hundred seventy-two".