10028005820 has 72 divisors (see below), whose sum is σ = 25786348560. Its totient is φ = 3257210880.

The previous prime is 10028005769. The next prime is 10028005861. The reversal of 10028005820 is 2850082001.

It is a self number, because there is not a number n which added to its sum of digits gives 10028005820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250661 + ... + 287900.

It is an arithmetic number, because the mean of its divisors is an integer number (358143730).

Almost surely, 2^10028005820 is an apocalyptic number.

10028005820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10028005820 is an abundant number, since it is smaller than the sum of its proper divisors (15758342740).

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

10028005820 is a wasteful number, since it uses less digits than its factorization.

10028005820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538603 (or 538594 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 10028005820 its reverse (2850082001), we get a palindrome (12878087821).

The spelling of 10028005820 in words is "ten billion, twenty-eight million, five thousand, eight hundred twenty".