1128938100 has 72 divisors (see below), whose sum is σ = 3379054560. Its totient is φ = 290666880.

The previous prime is 1128938093. The next prime is 1128938113. The reversal of 1128938100 is 18398211.

It is a super-2 number, since 2×1128938100² = 2549002467263220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56182 + ... + 73581.

Almost surely, 2^1128938100 is an apocalyptic number.

1128938100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128938100 is an abundant number, since it is smaller than the sum of its proper divisors (2250116460).

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

1128938100 is a wasteful number, since it uses less digits than its factorization.

1128938100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129809 (or 129802 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 1128938100 is about 33599.6741055624. The cubic root of 1128938100 is about 1041.2540653558.

The spelling of 1128938100 in words is "one billion, one hundred twenty-eight million, nine hundred thirty-eight thousand, one hundred".