28078080532 has 18 divisors (see below), whose sum is σ = 52197056702. Its totient is φ = 13213213824.

The previous prime is 28078080493. The next prime is 28078080559. The reversal of 28078080532 is 23508087082.

It can be written as a sum of positive squares in 3 ways, for example, as 6101796996 + 21976283536 = 78114^2 + 148244^2 .

It is a super-2 number, since 2×28078080532² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12143343 + ... + 12145654.

Almost surely, 2^28078080532 is an apocalyptic number.

It is an amenable number.

28078080532 is a deficient number, since it is larger than the sum of its proper divisors (24118976170).

28078080532 is a wasteful number, since it uses less digits than its factorization.

28078080532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24289035 (or 24289016 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 28078080532 in words is "twenty-eight billion, seventy-eight million, eighty thousand, five hundred thirty-two".