1157228864 has 28 divisors (see below), whose sum is σ = 2505139008. Its totient is φ = 526012800.

The previous prime is 1157228837. The next prime is 1157228869. The reversal of 1157228864 is 4688227511.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157228869) 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, 821192 + ... + 822599.

Almost surely, 2^1157228864 is an apocalyptic number.

It is an amenable number.

1157228864 is an abundant number, since it is smaller than the sum of its proper divisors (1347910144).

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

1157228864 is a wasteful number, since it uses less digits than its factorization.

1157228864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643814 (or 1643804 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 1157228864 is about 34018.0667293131. The cubic root of 1157228864 is about 1049.8802173260.

The spelling of 1157228864 in words is "one billion, one hundred fifty-seven million, two hundred twenty-eight thousand, eight hundred sixty-four".