28004415700 has 36 divisors (see below), whose sum is σ = 62412011452. Its totient is φ = 10899014400.

The previous prime is 28004415697. The next prime is 28004415701. The reversal of 28004415700 is 751440082.

It can be written as a sum of positive squares in 6 ways, for example, as 1175941264 + 26828474436 = 34292^2 + 163794^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28004415701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3780681 + ... + 3788080.

Almost surely, 2^28004415700 is an apocalyptic number.

28004415700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28004415700 is an abundant number, since it is smaller than the sum of its proper divisors (34407595752).

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

28004415700 is a wasteful number, since it uses less digits than its factorization.

28004415700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568812 (or 7568805 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

Adding to 28004415700 its reverse (751440082), we get a palindrome (28755855782).

The spelling of 28004415700 in words is "twenty-eight billion, four million, four hundred fifteen thousand, seven hundred".