28890663153750 has 400 divisors, whose sum is σ = 87057692995680. Its totient is φ = 7132095360000.

The previous prime is 28890663153727. The next prime is 28890663153769. The reversal of 28890663153750 is 5735136609882.

28890663153750 is a `hidden beast` number, since 2 + 8 + 8 + 9 + 0 + 66 + 31 + 537 + 5 + 0 = 666.

It is a super-2 number, since 2×28890663153750² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 104858671 + ... + 105133829.

Almost surely, 2^{28890663153750} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28890663153750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43528846497840).

28890663153750 is an abundant number, since it is smaller than the sum of its proper divisors (58167029841930).

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

28890663153750 is a wasteful number, since it uses less digits than its factorization.

28890663153750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275271 (or 275247 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 28890663153750 in words is "twenty-eight trillion, eight hundred ninety billion, six hundred sixty-three million, one hundred fifty-three thousand, seven hundred fifty".