1163987420 has 12 divisors (see below), whose sum is σ = 2444373624. Its totient is φ = 465594960.

The previous prime is 1163987353. The next prime is 1163987491. The reversal of 1163987420 is 247893611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29099666 + ... + 29099705.

It is an arithmetic number, because the mean of its divisors is an integer number (203697802).

Almost surely, 2^1163987420 is an apocalyptic number.

1163987420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163987420 is an abundant number, since it is smaller than the sum of its proper divisors (1280386204).

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

1163987420 is a wasteful number, since it uses less digits than its factorization.

1163987420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58199380 (or 58199378 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1163987420 is about 34117.2598548008. The cubic root of 1163987420 is about 1051.9201207258.

The spelling of 1163987420 in words is "one billion, one hundred sixty-three million, nine hundred eighty-seven thousand, four hundred twenty".