28531038 has 8 divisors (see below), whose sum is σ = 57062088. Its totient is φ = 9510344.

The previous prime is 28530979. The next prime is 28531051. The reversal of 28531038 is 83013582.

It is a happy number.

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

28531038 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28530996 and 28531014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377581 + ... + 2377592.

It is an arithmetic number, because the mean of its divisors is an integer number (7132761).

Almost surely, 2^28531038 is an apocalyptic number.

28531038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28531038 is a wasteful number, since it uses less digits than its factorization.

28531038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755178.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28531038 is about 5341.4453100261. The cubic root of 28531038 is about 305.5665827768.

The spelling of 28531038 in words is "twenty-eight million, five hundred thirty-one thousand, thirty-eight".