28078746632 has 16 divisors (see below), whose sum is σ = 52666094700. Its totient is φ = 14034454720.

The previous prime is 28078746617. The next prime is 28078746653. The reversal of 28078746632 is 23664787082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25668525796 + 2410220836 = 160214^2 + 49094^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590507 + ... + 636282.

Almost surely, 2^28078746632 is an apocalyptic number.

It is an amenable number.

28078746632 is a deficient number, since it is larger than the sum of its proper divisors (24587348068).

28078746632 is a wasteful number, since it uses less digits than its factorization.

28078746632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229656 (or 1229652 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 28078746632 in words is "twenty-eight billion, seventy-eight million, seven hundred forty-six thousand, six hundred thirty-two".