28057470 has 128 divisors (see below), whose sum is σ = 82999296. Its totient is φ = 5930496.

The previous prime is 28057459. The next prime is 28057481. The reversal of 28057470 is 7475082.

It is an interprime number because it is at equal distance from previous prime (28057459) and next prime (28057481).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 178632 + ... + 178788.

It is an arithmetic number, because the mean of its divisors is an integer number (648432).

Almost surely, 2^28057470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28057470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41499648).

28057470 is an abundant number, since it is smaller than the sum of its proper divisors (54941826).

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

28057470 is a wasteful number, since it uses less digits than its factorization.

28057470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 28057470 is about 5296.9302430748. The cubic root of 28057470 is about 303.8665085070.

The spelling of 28057470 in words is "twenty-eight million, fifty-seven thousand, four hundred seventy".