28897478 has 8 divisors (see below), whose sum is σ = 43501320. Its totient is φ = 14397040.

The previous prime is 28897441. The next prime is 28897511. The reversal of 28897478 is 87479882.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25148 + ... + 26271.

It is an arithmetic number, because the mean of its divisors is an integer number (5437665).

Almost surely, 2^28897478 is an apocalyptic number.

28897478 is a deficient number, since it is larger than the sum of its proper divisors (14603842).

28897478 is a wasteful number, since it uses less digits than its factorization.

28897478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51702.

The product of its digits is 1806336, while the sum is 53.

The square root of 28897478 is about 5375.6374505727. The cubic root of 28897478 is about 306.8692090362.

The spelling of 28897478 in words is "twenty-eight million, eight hundred ninety-seven thousand, four hundred seventy-eight".