28894438 has 8 divisors (see below), whose sum is σ = 43398432. Its totient is φ = 14428296.

The previous prime is 28894427. The next prime is 28894451. The reversal of 28894438 is 83449882.

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

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, 7470 + ... + 10657.

It is an arithmetic number, because the mean of its divisors is an integer number (5424804).

Almost surely, 2^28894438 is an apocalyptic number.

28894438 is a deficient number, since it is larger than the sum of its proper divisors (14503994).

28894438 is a wasteful number, since it uses less digits than its factorization.

28894438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18926.

The product of its digits is 442368, while the sum is 46.

The square root of 28894438 is about 5375.3546859719. The cubic root of 28894438 is about 306.8584478305.

The spelling of 28894438 in words is "twenty-eight million, eight hundred ninety-four thousand, four hundred thirty-eight".