28712270 has 8 divisors (see below), whose sum is σ = 51682104. Its totient is φ = 11484904.

The previous prime is 28712263. The next prime is 28712279. The reversal of 28712270 is 7221782.

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 (28712279) 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, 1435604 + ... + 1435623.

It is an arithmetic number, because the mean of its divisors is an integer number (6460263).

Almost surely, 2^28712270 is an apocalyptic number.

28712270 is a deficient number, since it is larger than the sum of its proper divisors (22969834).

28712270 is a wasteful number, since it uses less digits than its factorization.

28712270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871234.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 28712270 is about 5358.3831516606. The cubic root of 28712270 is about 306.2122141358.

It can be divided in two parts, 28712 and 270, that added together give a palindrome (28982).

The spelling of 28712270 in words is "twenty-eight million, seven hundred twelve thousand, two hundred seventy".