28060215421 has 16 divisors (see below), whose sum is σ = 32550249600. Its totient is φ = 23693093568.

The previous prime is 28060215383. The next prime is 28060215481. The reversal of 28060215421 is 12451206082.

It is a cyclic number.

It is not a de Polignac number, because 28060215421 - 2¹³ = 28060207229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28060215481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25710 + ... + 238288.

It is an arithmetic number, because the mean of its divisors is an integer number (2034390600).

Almost surely, 2^28060215421 is an apocalyptic number.

It is an amenable number.

28060215421 is a deficient number, since it is larger than the sum of its proper divisors (4490034179).

28060215421 is a wasteful number, since it uses less digits than its factorization.

28060215421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212868.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 28060215421 in words is "twenty-eight billion, sixty million, two hundred fifteen thousand, four hundred twenty-one".