28127477 has 8 divisors (see below), whose sum is σ = 33254400. Its totient is φ = 23277744.

The previous prime is 28127453. The next prime is 28127497. The reversal of 28127477 is 77472182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28127477 - 2⁸ = 28127221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28127477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28127417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69077 + ... + 69482.

It is an arithmetic number, because the mean of its divisors is an integer number (4156800).

Almost surely, 2^28127477 is an apocalyptic number.

It is an amenable number.

28127477 is a deficient number, since it is larger than the sum of its proper divisors (5126923).

28127477 is a wasteful number, since it uses less digits than its factorization.

28127477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138595.

The product of its digits is 43904, while the sum is 38.

The square root of 28127477 is about 5303.5343875570. The cubic root of 28127477 is about 304.1190272881.

The spelling of 28127477 in words is "twenty-eight million, one hundred twenty-seven thousand, four hundred seventy-seven".