28761761580 has 48 divisors (see below), whose sum is σ = 82497157344. Its totient is φ = 7482734080.

The previous prime is 28761761573. The next prime is 28761761603. The reversal of 28761761580 is 8516716782.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5843427 + ... + 5848346.

It is an arithmetic number, because the mean of its divisors is an integer number (1718690778).

Almost surely, 2^28761761580 is an apocalyptic number.

28761761580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28761761580 is an abundant number, since it is smaller than the sum of its proper divisors (53735395764).

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

28761761580 is a wasteful number, since it uses less digits than its factorization.

28761761580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11691826 (or 11691824 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 28761761580 in words is "twenty-eight billion, seven hundred sixty-one million, seven hundred sixty-one thousand, five hundred eighty".