1128638637 has 64 divisors (see below), whose sum is σ = 1947456000. Its totient is φ = 632738304.

The previous prime is 1128638603. The next prime is 1128638659. The reversal of 1128638637 is 7368368211.

1128638637 is a `hidden beast` number, since 1 + 1 + 2 + 8 + 6 + 3 + 8 + 637 = 666.

It is not a de Polignac number, because 1128638637 - 2¹⁰ = 1128637613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1128638592 and 1128638601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128638677) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3851863 + ... + 3852155.

It is an arithmetic number, because the mean of its divisors is an integer number (30429000).

Almost surely, 2^1128638637 is an apocalyptic number.

It is an amenable number.

1128638637 is a deficient number, since it is larger than the sum of its proper divisors (818817363).

1128638637 is a wasteful number, since it uses less digits than its factorization.

1128638637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 621 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1128638637 is about 33595.2174721343. The cubic root of 1128638637 is about 1041.1619892590.

The spelling of 1128638637 in words is "one billion, one hundred twenty-eight million, six hundred thirty-eight thousand, six hundred thirty-seven".