1028007855 has 48 divisors (see below), whose sum is σ = 2111875584. Its totient is φ = 469942560.

The previous prime is 1028007823. The next prime is 1028007857. The reversal of 1028007855 is 5587008201.

It is not a de Polignac number, because 1028007855 - 2⁵ = 1028007823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028007857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51931 + ... + 68940.

It is an arithmetic number, because the mean of its divisors is an integer number (43997408).

Almost surely, 2^1028007855 is an apocalyptic number.

1028007855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1028007855 is an abundant number, since it is smaller than the sum of its proper divisors (1083867729).

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

1028007855 is an equidigital number, since it uses as much as digits as its factorization.

1028007855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120898 (or 120886 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 1028007855 is about 32062.5615788882. The cubic root of 1028007855 is about 1009.2501230618.

The spelling of 1028007855 in words is "one billion, twenty-eight million, seven thousand, eight hundred fifty-five".