28970029922 has 4 divisors (see below), whose sum is σ = 43455044886. Its totient is φ = 14485014960.

The previous prime is 28970029889. The next prime is 28970030009. The reversal of 28970029922 is 22992007982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22992007982 = 2 ⋅11496003991.

It can be written as a sum of positive squares in only one way, i.e., 16936159321 + 12033870601 = 130139^2 + 109699^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7242507479 + ... + 7242507482.

Almost surely, 2^28970029922 is an apocalyptic number.

28970029922 is a deficient number, since it is larger than the sum of its proper divisors (14485014964).

28970029922 is a wasteful number, since it uses less digits than its factorization.

28970029922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14485014963.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 28970029922 in words is "twenty-eight billion, nine hundred seventy million, twenty-nine thousand, nine hundred twenty-two".