28231242020 has 48 divisors (see below), whose sum is σ = 59761095408. Its totient is φ = 11202048000.

The previous prime is 28231241999. The next prime is 28231242023. The reversal of 28231242020 is 2024213282.

It can be written as a sum of positive squares in 8 ways, for example, as 4553956 + 28226688064 = 2134^2 + 168008^2 .

It is not an unprimeable number, because it can be changed into a prime (28231242023) 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, 5129270 + ... + 5134770.

It is an arithmetic number, because the mean of its divisors is an integer number (1245022821).

Almost surely, 2^28231242020 is an apocalyptic number.

28231242020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28231242020 is an abundant number, since it is smaller than the sum of its proper divisors (31529853388).

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

28231242020 is a wasteful number, since it uses less digits than its factorization.

28231242020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7520 (or 7518 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The spelling of 28231242020 in words is "twenty-eight billion, two hundred thirty-one million, two hundred forty-two thousand, twenty".