28678452 has 36 divisors (see below), whose sum is σ = 73556448. Its totient is φ = 8690000.

The previous prime is 28678421. The next prime is 28678453. The reversal of 28678452 is 25487682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8424 + ... + 11327.

Almost surely, 2^28678452 is an apocalyptic number.

28678452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28678452 is an abundant number, since it is smaller than the sum of its proper divisors (44877996).

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

28678452 is a wasteful number, since it uses less digits than its factorization.

28678452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19780 (or 19767 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 28678452 is about 5355.2266058497. The cubic root of 28678452 is about 306.0919455425.

The spelling of 28678452 in words is "twenty-eight million, six hundred seventy-eight thousand, four hundred fifty-two".