28518424 has 16 divisors (see below), whose sum is σ = 58333320. Its totient is φ = 12962880.

The previous prime is 28518421. The next prime is 28518431. The reversal of 28518424 is 42481582.

It is a self number, because there is not a number n which added to its sum of digits gives 28518424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28518421) 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, 161949 + ... + 162124.

Almost surely, 2^28518424 is an apocalyptic number.

It is an amenable number.

28518424 is an abundant number, since it is smaller than the sum of its proper divisors (29814896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28518424 is a wasteful number, since it uses less digits than its factorization.

28518424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324090 (or 324086 counting only the distinct ones).

The product of its digits is 20480, while the sum is 34.

The square root of 28518424 is about 5340.2644129294. The cubic root of 28518424 is about 305.5215442817.

The spelling of 28518424 in words is "twenty-eight million, five hundred eighteen thousand, four hundred twenty-four".