28939454 has 8 divisors (see below), whose sum is σ = 43433928. Its totient is φ = 14461480.

The previous prime is 28939433. The next prime is 28939459. The reversal of 28939454 is 45493982.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28939459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2204 + ... + 7920.

It is an arithmetic number, because the mean of its divisors is an integer number (5429241).

Almost surely, 2^28939454 is an apocalyptic number.

28939454 is a deficient number, since it is larger than the sum of its proper divisors (14494474).

28939454 is a wasteful number, since it uses less digits than its factorization.

28939454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8250.

The product of its digits is 311040, while the sum is 44.

The square root of 28939454 is about 5379.5403149340. The cubic root of 28939454 is about 307.0177215346.

The spelling of 28939454 in words is "twenty-eight million, nine hundred thirty-nine thousand, four hundred fifty-four".