28503628 has 12 divisors (see below), whose sum is σ = 52815672. Its totient is φ = 13413440.

The previous prime is 28503617. The next prime is 28503649. The reversal of 28503628 is 82630582.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 28503593 and 28503602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209518 + ... + 209653.

It is an arithmetic number, because the mean of its divisors is an integer number (4401306).

Almost surely, 2^28503628 is an apocalyptic number.

It is an amenable number.

28503628 is a deficient number, since it is larger than the sum of its proper divisors (24312044).

28503628 is a wasteful number, since it uses less digits than its factorization.

28503628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419192 (or 419190 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28503628 is about 5338.8789085350. The cubic root of 28503628 is about 305.4686979910.

The spelling of 28503628 in words is "twenty-eight million, five hundred three thousand, six hundred twenty-eight".