28938502 has 4 divisors (see below), whose sum is σ = 43407756. Its totient is φ = 14469250.

The previous prime is 28938451. The next prime is 28938517. The reversal of 28938502 is 20583982.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7234624 + ... + 7234627.

It is an arithmetic number, because the mean of its divisors is an integer number (10851939).

Almost surely, 2^28938502 is an apocalyptic number.

28938502 is a deficient number, since it is larger than the sum of its proper divisors (14469254).

28938502 is a wasteful number, since it uses less digits than its factorization.

28938502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14469253.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 28938502 is about 5379.4518308095. The cubic root of 28938502 is about 307.0143549188.

The spelling of 28938502 in words is "twenty-eight million, nine hundred thirty-eight thousand, five hundred two".