1128580040 has 64 divisors (see below), whose sum is σ = 2921391360. Its totient is φ = 384364800.

The previous prime is 1128580001. The next prime is 1128580049. The reversal of 1128580040 is 400858211.

It is a junction number, because it is equal to n+sod(n) for n = 1128579985 and 1128580012.

It is not an unprimeable number, because it can be changed into a prime (1128580049) 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, 28934 + ... + 55626.

It is an arithmetic number, because the mean of its divisors is an integer number (45646740).

Almost surely, 2^1128580040 is an apocalyptic number.

1128580040 is a gapful number since it is divisible by the number (10) 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 1128580040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460695680).

1128580040 is an abundant number, since it is smaller than the sum of its proper divisors (1792811320).

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

1128580040 is a wasteful number, since it uses less digits than its factorization.

1128580040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26862 (or 26858 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 1128580040 is about 33594.3453575152. The cubic root of 1128580040 is about 1041.1439704935.

The spelling of 1128580040 in words is "one billion, one hundred twenty-eight million, five hundred eighty thousand, forty".