28787525250 has 64 divisors (see below), whose sum is σ = 78385836672. Its totient is φ = 6978792000.

The previous prime is 28787525237. The next prime is 28787525279. The reversal of 28787525250 is 5252578782.

It is a happy number.

It is a super-2 number, since 2×28787525250² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28787525193 and 28787525202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1736449 + ... + 1752948.

It is an arithmetic number, because the mean of its divisors is an integer number (1224778698).

Almost surely, 2^28787525250 is an apocalyptic number.

28787525250 is an abundant number, since it is smaller than the sum of its proper divisors (49598311422).

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

28787525250 is a wasteful number, since it uses less digits than its factorization.

28787525250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489428 (or 3489418 counting only the distinct ones).

The product of its (nonzero) digits is 3136000, while the sum is 51.

The spelling of 28787525250 in words is "twenty-eight billion, seven hundred eighty-seven million, five hundred twenty-five thousand, two hundred fifty".