1028581044 has 24 divisors (see below), whose sum is σ = 2400581568. Its totient is φ = 342780480.

The previous prime is 1028581009. The next prime is 1028581097. The reversal of 1028581044 is 4401858201.

It is a super-2 number, since 2×1028581044² = 2115957928152259872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1028580996 and 1028581014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68104 + ... + 81824.

It is an arithmetic number, because the mean of its divisors is an integer number (100024232).

Almost surely, 2^1028581044 is an apocalyptic number.

It is an amenable number.

1028581044 is an abundant number, since it is smaller than the sum of its proper divisors (1372000524).

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

1028581044 is a wasteful number, since it uses less digits than its factorization.

1028581044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19975 (or 19973 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 1028581044 is about 32071.4989359712. The cubic root of 1028581044 is about 1009.4376649443.

The spelling of 1028581044 in words is "one billion, twenty-eight million, five hundred eighty-one thousand, forty-four".