28013628 has 24 divisors (see below), whose sum is σ = 65699200. Its totient is φ = 9290160.

The previous prime is 28013621. The next prime is 28013641. The reversal of 28013628 is 82631082.

It is a junction number, because it is equal to n+sod(n) for n = 28013595 and 28013604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28013621) 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, 3478 + ... + 8253.

Almost surely, 2^28013628 is an apocalyptic number.

It is an amenable number.

28013628 is an abundant number, since it is smaller than the sum of its proper divisors (37685572).

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

28013628 is a wasteful number, since it uses less digits than its factorization.

28013628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11937 (or 11935 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 28013628 is about 5292.7901904383. The cubic root of 28013628 is about 303.7081542381.

The spelling of 28013628 in words is "twenty-eight million, thirteen thousand, six hundred twenty-eight".