1131928 has 64 divisors (see below), whose sum is σ = 2721600. Its totient is φ = 430080.

The previous prime is 1131919. The next prime is 1131937. The reversal of 1131928 is 8291311.

It is an interprime number because it is at equal distance from previous prime (1131919) and next prime (1131937).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27588 + ... + 27628.

It is an arithmetic number, because the mean of its divisors is an integer number (42525).

2^1131928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360800).

1131928 is an abundant number, since it is smaller than the sum of its proper divisors (1589672).

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

1131928 is a wasteful number, since it uses less digits than its factorization.

1131928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 96 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 1131928 is about 1063.9210497025. The cubic root of 1131928 is about 104.2172480391.

The spelling of 1131928 in words is "one million, one hundred thirty-one thousand, nine hundred twenty-eight".