28438502 has 16 divisors (see below), whose sum is σ = 45208800. Its totient is φ = 13392960.

The previous prime is 28438489. The next prime is 28438507. The reversal of 28438502 is 20583482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28438507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3602 + ... + 8357.

It is an arithmetic number, because the mean of its divisors is an integer number (2825550).

Almost surely, 2^28438502 is an apocalyptic number.

28438502 is a deficient number, since it is larger than the sum of its proper divisors (16770298).

28438502 is a wasteful number, since it uses less digits than its factorization.

28438502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12031.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 28438502 is about 5332.7762000669. The cubic root of 28438502 is about 305.2358723646.

The spelling of 28438502 in words is "twenty-eight million, four hundred thirty-eight thousand, five hundred two".