28024203400 has 48 divisors (see below), whose sum is σ = 65732930100. Its totient is φ = 11110471680.

The previous prime is 28024203397. The next prime is 28024203419. The reversal of 28024203400 is 430242082.

It can be written as a sum of positive squares in 6 ways, for example, as 578979844 + 27445223556 = 24062^2 + 165666^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 597405 + ... + 642604.

Almost surely, 2^28024203400 is an apocalyptic number.

28024203400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28024203400 is an abundant number, since it is smaller than the sum of its proper divisors (37708726700).

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

28024203400 is a wasteful number, since it uses less digits than its factorization.

28024203400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240138 (or 1240129 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 28024203400 its reverse (430242082), we get a palindrome (28454445482).

The spelling of 28024203400 in words is "twenty-eight billion, twenty-four million, two hundred three thousand, four hundred".