1155466638 has 24 divisors (see below), whose sum is σ = 2538774576. Its totient is φ = 379730400.

The previous prime is 1155466601. The next prime is 1155466651. The reversal of 1155466638 is 8366645511.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1155466593 and 1155466602.

It is a congruent number.

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, 450783 + ... + 453338.

It is an arithmetic number, because the mean of its divisors is an integer number (105782274).

Almost surely, 2^1155466638 is an apocalyptic number.

1155466638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1155466638 is an abundant number, since it is smaller than the sum of its proper divisors (1383307938).

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

1155466638 is a wasteful number, since it uses less digits than its factorization.

1155466638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904200 (or 904197 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 1155466638 is about 33992.1555362410. The cubic root of 1155466638 is about 1049.3470280288.

The spelling of 1155466638 in words is "one billion, one hundred fifty-five million, four hundred sixty-six thousand, six hundred thirty-eight".