1163257020 has 72 divisors (see below), whose sum is σ = 3642387840. Its totient is φ = 300193920.

The previous prime is 1163257013. The next prime is 1163257021. The reversal of 1163257020 is 207523611.

It is a happy number.

1163257020 is a `hidden beast` number, since 1 + 1 + 632 + 5 + 7 + 0 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163257021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98655 + ... + 109814.

It is an arithmetic number, because the mean of its divisors is an integer number (50588720).

Almost surely, 2^1163257020 is an apocalyptic number.

1163257020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163257020 is an abundant number, since it is smaller than the sum of its proper divisors (2479130820).

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

1163257020 is a wasteful number, since it uses less digits than its factorization.

1163257020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208515 (or 208510 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1163257020 is about 34106.5539156333. The cubic root of 1163257020 is about 1051.7000486969.

The spelling of 1163257020 in words is "one billion, one hundred sixty-three million, two hundred fifty-seven thousand, twenty".