1147157388 has 72 divisors (see below), whose sum is σ = 3189321408. Its totient is φ = 345454848.

The previous prime is 1147157377. The next prime is 1147157413. The reversal of 1147157388 is 8837517411.

1147157388 is a `hidden beast` number, since 1 + 1 + 4 + 71 + 573 + 8 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4081 + ... + 48072.

Almost surely, 2^1147157388 is an apocalyptic number.

1147157388 is a gapful number since it is divisible by the number (18) 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 1147157388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1594660704).

1147157388 is an abundant number, since it is smaller than the sum of its proper divisors (2042164020).

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

1147157388 is a wasteful number, since it uses less digits than its factorization.

1147157388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52223 (or 52218 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 1147157388 is about 33869.7119562597. The cubic root of 1147157388 is about 1046.8256018310.

The spelling of 1147157388 in words is "one billion, one hundred forty-seven million, one hundred fifty-seven thousand, three hundred eighty-eight".