28712478 has 16 divisors (see below), whose sum is σ = 57678480. Its totient is φ = 9528576.

The previous prime is 28712459. The next prime is 28712501. The reversal of 28712478 is 87421782.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9075 + ... + 11822.

It is an arithmetic number, because the mean of its divisors is an integer number (3604905).

Almost surely, 2^28712478 is an apocalyptic number.

28712478 is an abundant number, since it is smaller than the sum of its proper divisors (28966002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28712478 is a wasteful number, since it uses less digits than its factorization.

28712478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21131.

The product of its digits is 50176, while the sum is 39.

The square root of 28712478 is about 5358.4025604652. The cubic root of 28712478 is about 306.2129535640.

The spelling of 28712478 in words is "twenty-eight million, seven hundred twelve thousand, four hundred seventy-eight".