28724862 has 8 divisors (see below), whose sum is σ = 57449736. Its totient is φ = 9574952.

The previous prime is 28724837. The next prime is 28724863. The reversal of 28724862 is 26842782.

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

28724862 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28724862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28724863) 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, 2393733 + ... + 2393744.

It is an arithmetic number, because the mean of its divisors is an integer number (7181217).

Almost surely, 2^28724862 is an apocalyptic number.

28724862 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.

28724862 is a wasteful number, since it uses less digits than its factorization.

28724862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787482.

The product of its digits is 86016, while the sum is 39.

The square root of 28724862 is about 5359.5580041641. The cubic root of 28724862 is about 306.2569715475.

The spelling of 28724862 in words is "twenty-eight million, seven hundred twenty-four thousand, eight hundred sixty-two".