28154479 has 6 divisors (see below), whose sum is σ = 29093216. Its totient is φ = 27217680.

The previous prime is 28154471. The next prime is 28154509. The reversal of 28154479 is 97445182.

It is not a de Polignac number, because 28154479 - 2³ = 28154471 is a prime.

It is a super-2 number, since 2×28154479² = 1585349375522882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28154471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29067 + ... + 30019.

Almost surely, 2^28154479 is an apocalyptic number.

28154479 is a deficient number, since it is larger than the sum of its proper divisors (938737).

28154479 is an frugal number, since it uses more digits than its factorization.

28154479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937 (or 984 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 28154479 is about 5306.0794377770. The cubic root of 28154479 is about 304.2163128904.

The spelling of 28154479 in words is "twenty-eight million, one hundred fifty-four thousand, four hundred seventy-nine".