28761457530 has 128 divisors (see below), whose sum is σ = 77788988928. Its totient is φ = 6758249472.

The previous prime is 28761457523. The next prime is 28761457553. The reversal of 28761457530 is 3575416782.

It is a self number, because there is not a number n which added to its sum of digits gives 28761457530.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 745987 + ... + 783593.

It is an arithmetic number, because the mean of its divisors is an integer number (607726476).

Almost surely, 2^28761457530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28761457530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38894494464).

28761457530 is an abundant number, since it is smaller than the sum of its proper divisors (49027531398).

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

28761457530 is a wasteful number, since it uses less digits than its factorization.

28761457530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37720.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 28761457530 in words is "twenty-eight billion, seven hundred sixty-one million, four hundred fifty-seven thousand, five hundred thirty".