28070921095 has 32 divisors (see below), whose sum is σ = 38779776000. Its totient is φ = 19107830016.

The previous prime is 28070921093. The next prime is 28070921143. The reversal of 28070921095 is 59012907082.

It is a cyclic number.

It is not a de Polignac number, because 28070921095 - 2¹ = 28070921093 is a prime.

It is a super-2 number, since 2×28070921095² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28070921093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3178596 + ... + 3187414.

It is an arithmetic number, because the mean of its divisors is an integer number (1211868000).

Almost surely, 2^28070921095 is an apocalyptic number.

28070921095 is a deficient number, since it is larger than the sum of its proper divisors (10708854905).

28070921095 is a wasteful number, since it uses less digits than its factorization.

28070921095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9487.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 28070921095 in words is "twenty-eight billion, seventy million, nine hundred twenty-one thousand, ninety-five".