28981374 has 8 divisors (see below), whose sum is σ = 57962760. Its totient is φ = 9660456.

The previous prime is 28981349. The next prime is 28981409. The reversal of 28981374 is 47318982.

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

28981374 is an admirable number.

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, 2415109 + ... + 2415120.

It is an arithmetic number, because the mean of its divisors is an integer number (7245345).

Almost surely, 2^28981374 is an apocalyptic number.

28981374 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.

28981374 is a wasteful number, since it uses less digits than its factorization.

28981374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830234.

The product of its digits is 96768, while the sum is 42.

The square root of 28981374 is about 5383.4351486760. The cubic root of 28981374 is about 307.1658926502.

The spelling of 28981374 in words is "twenty-eight million, nine hundred eighty-one thousand, three hundred seventy-four".