28715371 has 4 divisors (see below), whose sum is σ = 28798000. Its totient is φ = 28632744.

The previous prime is 28715341. The next prime is 28715377. The reversal of 28715371 is 17351782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28715371 - 2⁹ = 28714859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28715377) 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, 40791 + ... + 41488.

It is an arithmetic number, because the mean of its divisors is an integer number (7199500).

Almost surely, 2^28715371 is an apocalyptic number.

28715371 is a deficient number, since it is larger than the sum of its proper divisors (82629).

28715371 is an equidigital number, since it uses as much as digits as its factorization.

28715371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82628.

The product of its digits is 11760, while the sum is 34.

The square root of 28715371 is about 5358.6725035217. The cubic root of 28715371 is about 306.2232376447.

The spelling of 28715371 in words is "twenty-eight million, seven hundred fifteen thousand, three hundred seventy-one".