28507542700 has 144 divisors (see below), whose sum is σ = 76608152320. Its totient is φ = 8966350080.

The previous prime is 28507542689. The next prime is 28507542703. The reversal of 28507542700 is 724570582.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28507542703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1473691 + ... + 1492909.

Almost surely, 2^28507542700 is an apocalyptic number.

28507542700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28507542700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38304076160).

28507542700 is an abundant number, since it is smaller than the sum of its proper divisors (48100609620).

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

28507542700 is a wasteful number, since it uses less digits than its factorization.

28507542700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19416 (or 19409 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 40.

The spelling of 28507542700 in words is "twenty-eight billion, five hundred seven million, five hundred forty-two thousand, seven hundred".