1140443928 has 128 divisors (see below), whose sum is σ = 3422865600. Its totient is φ = 349747200.

The previous prime is 1140443923. The next prime is 1140443939. The reversal of 1140443928 is 8293440411.

It is a happy number.

It is a super-2 number, since 2×1140443928² = 2601224705824138368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1140443892 and 1140443901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140443923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1294048 + ... + 1294928.

Almost surely, 2^1140443928 is an apocalyptic number.

1140443928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1140443928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1711432800).

1140443928 is an abundant number, since it is smaller than the sum of its proper divisors (2282421672).

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

1140443928 is a wasteful number, since it uses less digits than its factorization.

1140443928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1140443928 is about 33770.4593987112. The cubic root of 1140443928 is about 1044.7795076721.

The spelling of 1140443928 in words is "one billion, one hundred forty million, four hundred forty-three thousand, nine hundred twenty-eight".