28061451784 has 16 divisors (see below), whose sum is σ = 52736741820. Its totient is φ = 13998320640.

The previous prime is 28061451767. The next prime is 28061451787. The reversal of 28061451784 is 48715416082.

It can be written as a sum of positive squares in 2 ways, for example, as 23344784100 + 4716667684 = 152790^2 + 68678^2 .

It is not an unprimeable number, because it can be changed into a prime (28061451787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4046977 + ... + 4053904.

Almost surely, 2^28061451784 is an apocalyptic number.

It is an amenable number.

28061451784 is a deficient number, since it is larger than the sum of its proper divisors (24675290036).

28061451784 is a wasteful number, since it uses less digits than its factorization.

28061451784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101320 (or 8101316 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 28061451784 in words is "twenty-eight billion, sixty-one million, four hundred fifty-one thousand, seven hundred eighty-four".