28978338 has 8 divisors (see below), whose sum is σ = 57956688. Its totient is φ = 9659444.

The previous prime is 28978307. The next prime is 28978343. The reversal of 28978338 is 83387982.

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

28978338 is an admirable 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, 2414856 + ... + 2414867.

It is an arithmetic number, because the mean of its divisors is an integer number (7244586).

Almost surely, 2^28978338 is an apocalyptic number.

28978338 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.

28978338 is a wasteful number, since it uses less digits than its factorization.

28978338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4829728.

The product of its digits is 580608, while the sum is 48.

The square root of 28978338 is about 5383.1531651997. The cubic root of 28978338 is about 307.1551663562.

The spelling of 28978338 in words is "twenty-eight million, nine hundred seventy-eight thousand, three hundred thirty-eight".