28408765253250 has 32 divisors (see below), whose sum is σ = 70908278073984. Its totient is φ = 7575670734000.

The previous prime is 28408765253227. The next prime is 28408765253251. The reversal of 28408765253250 is 5235256780482.

It is not an unprimeable number, because it can be changed into a prime (28408765253251) 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, 18939176086 + ... + 18939177585.

It is an arithmetic number, because the mean of its divisors is an integer number (2215883689812).

Almost surely, 2^{28408765253250} is an apocalyptic number.

28408765253250 is an abundant number, since it is smaller than the sum of its proper divisors (42499512820734).

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

28408765253250 is a wasteful number, since it uses less digits than its factorization.

28408765253250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37878353691 (or 37878353681 counting only the distinct ones).

The product of its (nonzero) digits is 32256000, while the sum is 57.

The spelling of 28408765253250 in words is "twenty-eight trillion, four hundred eight billion, seven hundred sixty-five million, two hundred fifty-three thousand, two hundred fifty".