28999061312 has 56 divisors (see below), whose sum is σ = 65616969096. Its totient is φ = 12596871168.

The previous prime is 28999061309. The next prime is 28999061327. The reversal of 28999061312 is 21316099982.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1195499776 + 27803561536 = 34576^2 + 166744^2 .

It is a super-2 number, since 2×28999061312² (a number of 22 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 7 ways as a sum of consecutive naturals, for example, 1010993 + ... + 1039280.

It is an arithmetic number, because the mean of its divisors is an integer number (1171731591).

Almost surely, 2^28999061312 is an apocalyptic number.

It is an amenable number.

28999061312 is an abundant number, since it is smaller than the sum of its proper divisors (36617907784).

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

28999061312 is a wasteful number, since it uses less digits than its factorization.

28999061312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050315 (or 2050305 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 28999061312 in words is "twenty-eight billion, nine hundred ninety-nine million, sixty-one thousand, three hundred twelve".