28781414147 has 4 divisors (see below), whose sum is σ = 28796652360. Its totient is φ = 28766175936.

The previous prime is 28781414119. The next prime is 28781414177. The reversal of 28781414147 is 74141418782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28781414147 - 2²⁴ = 28764636931 is a prime.

It is a super-2 number, since 2×28781414147² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28781414177) 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, 7616273 + ... + 7620050.

It is an arithmetic number, because the mean of its divisors is an integer number (7199163090).

Almost surely, 2^28781414147 is an apocalyptic number.

28781414147 is a deficient number, since it is larger than the sum of its proper divisors (15238213).

28781414147 is a wasteful number, since it uses less digits than its factorization.

28781414147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15238212.

The product of its digits is 401408, while the sum is 47.

The spelling of 28781414147 in words is "twenty-eight billion, seven hundred eighty-one million, four hundred fourteen thousand, one hundred forty-seven".