28500642 has 12 divisors (see below), whose sum is σ = 61751430. Its totient is φ = 9500208.

The previous prime is 28500631. The next prime is 28500643. The reversal of 28500642 is 24600582.

It can be written as a sum of positive squares in only one way, i.e., 23532201 + 4968441 = 4851^2 + 2229^2 .

It is not an unprimeable number, because it can be changed into a prime (28500643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 791667 + ... + 791702.

Almost surely, 2^28500642 is an apocalyptic number.

28500642 is an abundant number, since it is smaller than the sum of its proper divisors (33250788).

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

28500642 is a wasteful number, since it uses less digits than its factorization.

28500642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583377 (or 1583374 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 28500642 is about 5338.5992544861. The cubic root of 28500642 is about 305.4580307947.

The spelling of 28500642 in words is "twenty-eight million, five hundred thousand, six hundred forty-two".