28603661428 has 12 divisors (see below), whose sum is σ = 50072781892. Its totient is φ = 14297152320.

The previous prime is 28603661417. The next prime is 28603661431. The reversal of 28603661428 is 82416630682.

It can be written as a sum of positive squares in 2 ways, for example, as 23356397584 + 5247263844 = 152828^2 + 72438^2 .

It is a congruent number.

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, 1155825 + ... + 1180312.

Almost surely, 2^28603661428 is an apocalyptic number.

It is an amenable number.

28603661428 is a deficient number, since it is larger than the sum of its proper divisors (21469120464).

28603661428 is a wasteful number, since it uses less digits than its factorization.

28603661428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339202 (or 2339200 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 28603661428 in words is "twenty-eight billion, six hundred three million, six hundred sixty-one thousand, four hundred twenty-eight".