28671949450 has 12 divisors (see below), whose sum is σ = 53329826070. Its totient is φ = 11468779760.

The previous prime is 28671949421. The next prime is 28671949469. The reversal of 28671949450 is 5494917682.

It can be written as a sum of positive squares in 3 ways, for example, as 27632080441 + 1039869009 = 166229^2 + 32247^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28671949391 and 28671949400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286719445 + ... + 286719544.

Almost surely, 2^28671949450 is an apocalyptic number.

28671949450 is a deficient number, since it is larger than the sum of its proper divisors (24657876620).

28671949450 is a wasteful number, since it uses less digits than its factorization.

28671949450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573439001 (or 573438996 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

It can be divided in two parts, 28671 and 949450, that added together give a square (978121 = 989²).

The spelling of 28671949450 in words is "twenty-eight billion, six hundred seventy-one million, nine hundred forty-nine thousand, four hundred fifty".