28414881 has 20 divisors (see below), whose sum is σ = 46307184. Its totient is φ = 17220600.

The previous prime is 28414843. The next prime is 28414891. The reversal of 28414881 is 18841482.

It is a happy number.

It is not a de Polignac number, because 28414881 - 2⁷ = 28414753 is a prime.

It is a super-2 number, since 2×28414881² = 1614810924488322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28414831) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15055 + ... + 16836.

Almost surely, 2^28414881 is an apocalyptic number.

It is an amenable number.

28414881 is a deficient number, since it is larger than the sum of its proper divisors (17892303).

28414881 is a wasteful number, since it uses less digits than its factorization.

28414881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31914 (or 31905 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 28414881 is about 5330.5610398906. The cubic root of 28414881 is about 305.1513393881.

The spelling of 28414881 in words is "twenty-eight million, four hundred fourteen thousand, eight hundred eighty-one".