1128235992 has 64 divisors (see below), whose sum is σ = 3087406560. Its totient is φ = 341452800.

The previous prime is 1128235973. The next prime is 1128235993. The reversal of 1128235992 is 2995328211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128235993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10609 + ... + 48672.

Almost surely, 2^1128235992 is an apocalyptic number.

1128235992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1128235992 is an abundant number, since it is smaller than the sum of its proper divisors (1959170568).

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

1128235992 is a wasteful number, since it uses less digits than its factorization.

1128235992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59364 (or 59360 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 1128235992 is about 33589.2243435302. The cubic root of 1128235992 is about 1041.0381620458.

It can be divided in two parts, 11282 and 35992, that added together give a palindrome (47274).

The spelling of 1128235992 in words is "one billion, one hundred twenty-eight million, two hundred thirty-five thousand, nine hundred ninety-two".