28878575312 has 10 divisors (see below), whose sum is σ = 55952239698. Its totient is φ = 14439287648.

The previous prime is 28878575303. The next prime is 28878575423. The reversal of 28878575312 is 21357587882.

It can be written as a sum of positive squares in only one way, i.e., 26152064656 + 2726510656 = 161716^2 + 52216^2 .

It is a super-2 number, since 2×28878575312² (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 as a sum of consecutive naturals, namely, 902455463 + ... + 902455494.

Almost surely, 2^28878575312 is an apocalyptic number.

It is an amenable number.

28878575312 is a deficient number, since it is larger than the sum of its proper divisors (27073664386).

28878575312 is a wasteful number, since it uses less digits than its factorization.

28878575312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804910965 (or 1804910959 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 56.

The spelling of 28878575312 in words is "twenty-eight billion, eight hundred seventy-eight million, five hundred seventy-five thousand, three hundred twelve".