28149436 has 24 divisors (see below), whose sum is σ = 56601440. Its totient is φ = 11999232.

The previous prime is 28149421. The next prime is 28149439. The reversal of 28149436 is 63494182.

It is a junction number, because it is equal to n+sod(n) for n = 28149395 and 28149404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28149439) 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, 2800 + ... + 8008.

Almost surely, 2^28149436 is an apocalyptic number.

It is an amenable number.

28149436 is an abundant number, since it is smaller than the sum of its proper divisors (28452004).

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

28149436 is a wasteful number, since it uses less digits than its factorization.

28149436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413 (or 5411 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 28149436 is about 5305.6042068741. The cubic root of 28149436 is about 304.1981481729.

The spelling of 28149436 in words is "twenty-eight million, one hundred forty-nine thousand, four hundred thirty-six".