28642038 has 16 divisors (see below), whose sum is σ = 59774976. Its totient is φ = 9132200.

The previous prime is 28642037. The next prime is 28642051. The reversal of 28642038 is 83024682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28642037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103638 + ... + 103913.

It is an arithmetic number, because the mean of its divisors is an integer number (3735936).

Almost surely, 2^28642038 is an apocalyptic number.

28642038 is an abundant number, since it is smaller than the sum of its proper divisors (31132938).

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

28642038 is a wasteful number, since it uses less digits than its factorization.

28642038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207579.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 28642038 is about 5351.8256698065. The cubic root of 28642038 is about 305.9623389081.

It can be divided in two parts, 286 and 42038, that added together give a palindrome (42324).

The spelling of 28642038 in words is "twenty-eight million, six hundred forty-two thousand, thirty-eight".