28100502 has 12 divisors (see below), whose sum is σ = 60884460. Its totient is φ = 9366828.

The previous prime is 28100497. The next prime is 28100509. The reversal of 28100502 is 20500182.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1561139 = 28100502 / (2 + 8 + 1 + 0 + 0 + 5 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28100509) 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, 780552 + ... + 780587.

It is an arithmetic number, because the mean of its divisors is an integer number (5073705).

Almost surely, 2^28100502 is an apocalyptic number.

28100502 is an abundant number, since it is smaller than the sum of its proper divisors (32783958).

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

28100502 is a wasteful number, since it uses less digits than its factorization.

28100502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561147 (or 1561144 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 28100502 is about 5300.9906621310. The cubic root of 28100502 is about 304.0217767756.

Adding to 28100502 its reverse (20500182), we get a palindrome (48600684).

The spelling of 28100502 in words is "twenty-eight million, one hundred thousand, five hundred two".