28028036 has 48 divisors (see below), whose sum is σ = 54840240. Its totient is φ = 12472320.

The previous prime is 28028029. The next prime is 28028057. The reversal of 28028036 is 63082082.

It can be written as a sum of positive squares in 8 ways, for example, as 2464900 + 25563136 = 1570^2 + 5056^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120176 + ... + 120408.

It is an arithmetic number, because the mean of its divisors is an integer number (1142505).

Almost surely, 2^28028036 is an apocalyptic number.

It is an amenable number.

28028036 is a deficient number, since it is larger than the sum of its proper divisors (26812204).

28028036 is a wasteful number, since it uses less digits than its factorization.

28028036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28028036 is about 5294.1511123125. The cubic root of 28028036 is about 303.7602131516.

The spelling of 28028036 in words is "twenty-eight million, twenty-eight thousand, thirty-six".