28501838 has 16 divisors (see below), whose sum is σ = 44982000. Its totient is φ = 13524672.

The previous prime is 28501831. The next prime is 28501841. The reversal of 28501838 is 83810582.

It is a junction number, because it is equal to n+sod(n) for n = 28501798 and 28501807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28501831) 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, 743 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (2811375).

Almost surely, 2^28501838 is an apocalyptic number.

28501838 is a deficient number, since it is larger than the sum of its proper divisors (16480162).

28501838 is a wasteful number, since it uses less digits than its factorization.

28501838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8419.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 28501838 is about 5338.7112677125. The cubic root of 28501838 is about 305.4623034785.

The spelling of 28501838 in words is "twenty-eight million, five hundred one thousand, eight hundred thirty-eight".