1028556396 has 72 divisors (see below), whose sum is σ = 3015783680. Its totient is φ = 289482336.

The previous prime is 1028556391. The next prime is 1028556401. The reversal of 1028556396 is 6936558201.

1028556396 is a `hidden beast` number, since 1 + 0 + 2 + 8 + 5 + 5 + 639 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1028556391) and next prime (1028556401).

It is not an unprimeable number, because it can be changed into a prime (1028556391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13576 + ... + 47343.

Almost surely, 2^1028556396 is an apocalyptic number.

It is an amenable number.

1028556396 is an abundant number, since it is smaller than the sum of its proper divisors (1987227284).

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

1028556396 is a wasteful number, since it uses less digits than its factorization.

1028556396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61003 (or 60998 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 1028556396 is about 32071.1146672516. The cubic root of 1028556396 is about 1009.4296017915.

The spelling of 1028556396 in words is "one billion, twenty-eight million, five hundred fifty-six thousand, three hundred ninety-six".