28358028 has 36 divisors (see below), whose sum is σ = 72327528. Its totient is φ = 9367680.

The previous prime is 28358017. The next prime is 28358053. The reversal of 28358028 is 82085382.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 28357983 and 28358001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583 + ... + 7553.

It is an arithmetic number, because the mean of its divisors is an integer number (2009098).

Almost surely, 2^28358028 is an apocalyptic number.

It is an amenable number.

28358028 is an abundant number, since it is smaller than the sum of its proper divisors (43969500).

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

28358028 is a wasteful number, since it uses less digits than its factorization.

28358028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094 (or 7089 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 28358028 is about 5325.2256290227. The cubic root of 28358028 is about 304.9476860916.

It can be divided in two parts, 283 and 58028, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 28358028 in words is "twenty-eight million, three hundred fifty-eight thousand, twenty-eight".