28615214 has 4 divisors (see below), whose sum is σ = 42922824. Its totient is φ = 14307606.

The previous prime is 28615207. The next prime is 28615217. The reversal of 28615214 is 41251682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41251682 = 2 ⋅20625841.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28615217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7153802 + ... + 7153805.

It is an arithmetic number, because the mean of its divisors is an integer number (10730706).

Almost surely, 2^28615214 is an apocalyptic number.

28615214 is a deficient number, since it is larger than the sum of its proper divisors (14307610).

28615214 is a wasteful number, since it uses less digits than its factorization.

28615214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14307609.

The product of its digits is 3840, while the sum is 29.

The square root of 28615214 is about 5349.3190220812. The cubic root of 28615214 is about 305.8667952277.

Adding to 28615214 its reverse (41251682), we get a palindrome (69866896).

The spelling of 28615214 in words is "twenty-eight million, six hundred fifteen thousand, two hundred fourteen".