28774315 has 4 divisors (see below), whose sum is σ = 34529184. Its totient is φ = 23019448.

The previous prime is 28774313. The next prime is 28774363. The reversal of 28774315 is 51347782.

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 28774315 - 2¹ = 28774313 is a prime.

It is a super-2 number, since 2×28774315² = 1655922407438450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28774313) 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, 2877427 + ... + 2877436.

It is an arithmetic number, because the mean of its divisors is an integer number (8632296).

Almost surely, 2^28774315 is an apocalyptic number.

28774315 is a deficient number, since it is larger than the sum of its proper divisors (5754869).

28774315 is an equidigital number, since it uses as much as digits as its factorization.

28774315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5754868.

The product of its digits is 47040, while the sum is 37.

The square root of 28774315 is about 5364.1695536215. The cubic root of 28774315 is about 306.4326224392.

The spelling of 28774315 in words is "twenty-eight million, seven hundred seventy-four thousand, three hundred fifteen".