1128038391 has 6 divisors (see below), whose sum is σ = 1629388800. Its totient is φ = 752025588.

The previous prime is 1128038347. The next prime is 1128038419. The reversal of 1128038391 is 1938308211.

1128038391 is a `hidden beast` number, since 112 + 80 + 383 + 91 = 666.

It is not a de Polignac number, because 1128038391 - 2¹⁰ = 1128037367 is a prime.

It is a super-2 number, since 2×1128038391² = 2544941223139737762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128038311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62668791 + ... + 62668808.

It is an arithmetic number, because the mean of its divisors is an integer number (271564800).

Almost surely, 2^1128038391 is an apocalyptic number.

1128038391 is a deficient number, since it is larger than the sum of its proper divisors (501350409).

1128038391 is a wasteful number, since it uses less digits than its factorization.

1128038391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125337605 (or 125337602 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1128038391 is about 33586.2827803257. The cubic root of 1128038391 is about 1040.9773821516.

The spelling of 1128038391 in words is "one billion, one hundred twenty-eight million, thirty-eight thousand, three hundred ninety-one".