28390127447 has 16 divisors (see below), whose sum is σ = 31055331840. Its totient is φ = 25739078400.

The previous prime is 28390127431. The next prime is 28390127461. The reversal of 28390127447 is 74472109382.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28390127447 - 2⁴ = 28390127431 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 (28390117447) 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, 7689872 + ... + 7693562.

It is an arithmetic number, because the mean of its divisors is an integer number (1940958240).

Almost surely, 2^28390127447 is an apocalyptic number.

28390127447 is a deficient number, since it is larger than the sum of its proper divisors (2665204393).

28390127447 is a wasteful number, since it uses less digits than its factorization.

28390127447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5414.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 28390127447 in words is "twenty-eight billion, three hundred ninety million, one hundred twenty-seven thousand, four hundred forty-seven".