1128023901 has 20 divisors (see below), whose sum is σ = 1773763200. Its totient is φ = 712435176.

The previous prime is 1128023881. The next prime is 1128023909. The reversal of 1128023901 is 1093208211.

It is a de Polignac number, because none of the positive numbers 2^k-1128023901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128023909) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 364941 + ... + 368018.

It is an arithmetic number, because the mean of its divisors is an integer number (88688160).

Almost surely, 2^1128023901 is an apocalyptic number.

It is an amenable number.

1128023901 is a deficient number, since it is larger than the sum of its proper divisors (645739299).

1128023901 is an equidigital number, since it uses as much as digits as its factorization.

1128023901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732990 (or 732981 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1128023901 is about 33586.0670665679. The cubic root of 1128023901 is about 1040.9729249077.

The spelling of 1128023901 in words is "one billion, one hundred twenty-eight million, twenty-three thousand, nine hundred one".