1153388520 has 48 divisors (see below), whose sum is σ = 3748513860. Its totient is φ = 307570176.

The previous prime is 1153388519. The next prime is 1153388543. The reversal of 1153388520 is 258833511.

1153388520 is a `hidden beast` number, since 1 + 1 + 53 + 3 + 88 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1099718244 + 53670276 = 33162^2 + 7326^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1601569 + ... + 1602288.

Almost surely, 2^1153388520 is an apocalyptic number.

1153388520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153388520 is an abundant number, since it is smaller than the sum of its proper divisors (2595125340).

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

1153388520 is a wasteful number, since it uses less digits than its factorization.

1153388520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203874 (or 3203867 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 1153388520 is about 33961.5741684628. The cubic root of 1153388520 is about 1048.7175635625.

The spelling of 1153388520 in words is "one billion, one hundred fifty-three million, three hundred eighty-eight thousand, five hundred twenty".