28021634001 has 12 divisors (see below), whose sum is σ = 41416989328. Its totient is φ = 18246645144.

The previous prime is 28021633963. The next prime is 28021634023. The reversal of 28021634001 is 10043612082.

28021634001 is a `hidden beast` number, since 2 + 8 + 0 + 21 + 634 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 28021634001 - 2³⁰ = 26947892177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28021634041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36203275 + ... + 36204048.

Almost surely, 2^28021634001 is an apocalyptic number.

It is an amenable number.

28021634001 is a deficient number, since it is larger than the sum of its proper divisors (13395355327).

28021634001 is a wasteful number, since it uses less digits than its factorization.

28021634001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72407372 (or 72407369 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 28021634001 in words is "twenty-eight billion, twenty-one million, six hundred thirty-four thousand, one".