1163242638 has 48 divisors (see below), whose sum is σ = 2555083440. Its totient is φ = 382428288.

The previous prime is 1163242637. The next prime is 1163242651. The reversal of 1163242638 is 8362423611.

1163242638 is a `hidden beast` number, since 1 + 16 + 3 + 2 + 4 + 2 + 638 = 666.

It is a super-2 number, since 2×1163242638² = 2706266869722398088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163242631) 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, 939756 + ... + 940992.

It is an arithmetic number, because the mean of its divisors is an integer number (53230905).

Almost surely, 2^1163242638 is an apocalyptic number.

1163242638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1163242638 is an abundant number, since it is smaller than the sum of its proper divisors (1391840802).

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

1163242638 is a wasteful number, since it uses less digits than its factorization.

1163242638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921 (or 1918 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1163242638 is about 34106.3430757389. The cubic root of 1163242638 is about 1051.6957144262.

The spelling of 1163242638 in words is "one billion, one hundred sixty-three million, two hundred forty-two thousand, six hundred thirty-eight".