28081645034 has 16 divisors (see below), whose sum is σ = 42229450440. Its totient is φ = 14005194240.

The previous prime is 28081645013. The next prime is 28081645051. The reversal of 28081645034 is 43054618082.

It can be written as a sum of positive squares in 4 ways, for example, as 27009279025 + 1072366009 = 164345^2 + 32747^2 .

It is a super-2 number, since 2×28081645034² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28081644982 and 28081645000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021954 + ... + 2035794.

Almost surely, 2^28081645034 is an apocalyptic number.

28081645034 is a deficient number, since it is larger than the sum of its proper divisors (14147805406).

28081645034 is a wasteful number, since it uses less digits than its factorization.

28081645034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16345.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 28081645034 in words is "twenty-eight billion, eighty-one million, six hundred forty-five thousand, thirty-four".