28574424149 has 4 divisors (see below), whose sum is σ = 28597525164. Its totient is φ = 28551323136.

The previous prime is 28574424139. The next prime is 28574424259. The reversal of 28574424149 is 94142447582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94142447582 = 2 ⋅47071223791.

It can be written as a sum of positive squares in 2 ways, for example, as 25991243524 + 2583180625 = 161218^2 + 50825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28574424149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28574424097 and 28574424106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28574424119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11548652 + ... + 11551125.

It is an arithmetic number, because the mean of its divisors is an integer number (7149381291).

Almost surely, 2^28574424149 is an apocalyptic number.

It is an amenable number.

28574424149 is a deficient number, since it is larger than the sum of its proper divisors (23101015).

28574424149 is a wasteful number, since it uses less digits than its factorization.

28574424149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23101014.

The product of its digits is 2580480, while the sum is 50.

The spelling of 28574424149 in words is "twenty-eight billion, five hundred seventy-four million, four hundred twenty-four thousand, one hundred forty-nine".