28750838 has 8 divisors (see below), whose sum is σ = 45396120. Its totient is φ = 13618800.

The previous prime is 28750823. The next prime is 28750873. The reversal of 28750838 is 83805782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28750838² = 1653221371404488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28750795 and 28750804.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 378263 + ... + 378338.

It is an arithmetic number, because the mean of its divisors is an integer number (5674515).

Almost surely, 2^28750838 is an apocalyptic number.

28750838 is a deficient number, since it is larger than the sum of its proper divisors (16645282).

28750838 is a wasteful number, since it uses less digits than its factorization.

28750838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756622.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 28750838 is about 5361.9807907153. The cubic root of 28750838 is about 306.3492601752.

The spelling of 28750838 in words is "twenty-eight million, seven hundred fifty thousand, eight hundred thirty-eight".