1157662660 has 144 divisors (see below), whose sum is σ = 3138170112. Its totient is φ = 350887680.

The previous prime is 1157662643. The next prime is 1157662663. The reversal of 1157662660 is 662667511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157662663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 625857 + ... + 627703.

It is an arithmetic number, because the mean of its divisors is an integer number (21792848).

Almost surely, 2^1157662660 is an apocalyptic number.

1157662660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157662660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1569085056).

1157662660 is an abundant number, since it is smaller than the sum of its proper divisors (1980507452).

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

1157662660 is a wasteful number, since it uses less digits than its factorization.

1157662660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922 (or 1909 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1157662660 is about 34024.4420968221. The cubic root of 1157662660 is about 1050.0113861199.

The spelling of 1157662660 in words is "one billion, one hundred fifty-seven million, six hundred sixty-two thousand, six hundred sixty".