28424628 has 24 divisors (see below), whose sum is σ = 73693760. Its totient is φ = 9474840.

The previous prime is 28424609. The next prime is 28424633. The reversal of 28424628 is 82642482.

It is a happy number.

28424628 is a `hidden beast` number, since 2 + 8 + 4 + 24 + 628 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28424592 and 28424601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131488 + ... + 131703.

Almost surely, 2^28424628 is an apocalyptic number.

It is an amenable number.

28424628 is an abundant number, since it is smaller than the sum of its proper divisors (45269132).

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

28424628 is a wasteful number, since it uses less digits than its factorization.

28424628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263204 (or 263196 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 28424628 is about 5331.4752179861. The cubic root of 28424628 is about 305.1862268599.

The spelling of 28424628 in words is "twenty-eight million, four hundred twenty-four thousand, six hundred twenty-eight".