28621762139850 has 384 divisors, whose sum is σ = 83865087148032. Its totient is φ = 6381529804800.

The previous prime is 28621762139809. The next prime is 28621762139911. The reversal of 28621762139850 is 5893126712682.

It is a super-3 number, since 3×28621762139850³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 860865927 + ... + 860899173.

It is an arithmetic number, because the mean of its divisors is an integer number (218398664448).

Almost surely, 2^{28621762139850} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28621762139850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41932543574016).

28621762139850 is an abundant number, since it is smaller than the sum of its proper divisors (55243325008182).

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

28621762139850 is a wasteful number, since it uses less digits than its factorization.

28621762139850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33990 (or 33985 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 28621762139850 in words is "twenty-eight trillion, six hundred twenty-one billion, seven hundred sixty-two million, one hundred thirty-nine thousand, eight hundred fifty".