28114477 has 4 divisors (see below), whose sum is σ = 28430460. Its totient is φ = 27798496.

The previous prime is 28114469. The next prime is 28114501. The reversal of 28114477 is 77441182.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19900521 + 8213956 = 4461^2 + 2866^2 .

It is a cyclic number.

It is not a de Polignac number, because 28114477 - 2³ = 28114469 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 (28112477) 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, 157858 + ... + 158035.

It is an arithmetic number, because the mean of its divisors is an integer number (7107615).

Almost surely, 2^28114477 is an apocalyptic number.

It is an amenable number.

28114477 is a deficient number, since it is larger than the sum of its proper divisors (315983).

28114477 is an equidigital number, since it uses as much as digits as its factorization.

28114477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315982.

The product of its digits is 12544, while the sum is 34.

The square root of 28114477 is about 5302.3086481268. The cubic root of 28114477 is about 304.0721673369.

The spelling of 28114477 in words is "twenty-eight million, one hundred fourteen thousand, four hundred seventy-seven".