28577478 has 8 divisors (see below), whose sum is σ = 57154968. Its totient is φ = 9525824.

The previous prime is 28577473. The next prime is 28577489. The reversal of 28577478 is 87477582.

It is a happy number.

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

28577478 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28577473) 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, 2381451 + ... + 2381462.

It is an arithmetic number, because the mean of its divisors is an integer number (7144371).

Almost surely, 2^28577478 is an apocalyptic number.

28577478 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.

28577478 is a wasteful number, since it uses less digits than its factorization.

28577478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762918.

The product of its digits is 878080, while the sum is 48.

The square root of 28577478 is about 5345.7906805261. The cubic root of 28577478 is about 305.7322832531.

The spelling of 28577478 in words is "twenty-eight million, five hundred seventy-seven thousand, four hundred seventy-eight".