28761133122 has 54 divisors (see below), whose sum is σ = 63318302931. Its totient is φ = 9435226920.

The previous prime is 28761133109. The next prime is 28761133201. The reversal of 28761133122 is 22133116782.

28761133122 is a `hidden beast` number, since 2 + 8 + 7 + 611 + 3 + 31 + 2 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14380566561 + 14380566561 = 119919^2 + 119919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119919.

It is a super-2 number, since 2×28761133122² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 51085213 + ... + 51085775.

Almost surely, 2^28761133122 is an apocalyptic number.

28761133122 is an abundant number, since it is smaller than the sum of its proper divisors (34557169809).

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

28761133122 is an frugal number, since it uses more digits than its factorization.

28761133122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 639 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The spelling of 28761133122 in words is "twenty-eight billion, seven hundred sixty-one million, one hundred thirty-three thousand, one hundred twenty-two".