1157557436 has 12 divisors (see below), whose sum is σ = 2315114928. Its totient is φ = 496096032.

The previous prime is 1157557433. The next prime is 1157557483. The reversal of 1157557436 is 6347557511.

It is a happy number.

1157557436 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157557433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20670641 + ... + 20670696.

It is an arithmetic number, because the mean of its divisors is an integer number (192926244).

Almost surely, 2^1157557436 is an apocalyptic number.

It is an amenable number.

1157557436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1157557436 is a wasteful number, since it uses less digits than its factorization.

1157557436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41341348 (or 41341346 counting only the distinct ones).

The product of its digits is 441000, while the sum is 44.

The square root of 1157557436 is about 34022.8957615309. The cubic root of 1157557436 is about 1049.9795720893.

The spelling of 1157557436 in words is "one billion, one hundred fifty-seven million, five hundred fifty-seven thousand, four hundred thirty-six".