28232615 has 8 divisors (see below), whose sum is σ = 35352288. Its totient is φ = 21604000.

The previous prime is 28232593. The next prime is 28232627. The reversal of 28232615 is 51623282.

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

It is not a de Polignac number, because 28232615 - 2⁶ = 28232551 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122636 + ... + 122865.

It is an arithmetic number, because the mean of its divisors is an integer number (4419036).

Almost surely, 2^28232615 is an apocalyptic number.

28232615 is a deficient number, since it is larger than the sum of its proper divisors (7119673).

28232615 is a wasteful number, since it uses less digits than its factorization.

28232615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245529.

The product of its digits is 5760, while the sum is 29.

The square root of 28232615 is about 5313.4372114480. The cubic root of 28232615 is about 304.4974794043.

Adding to 28232615 its reverse (51623282), we get a palindrome (79855897).

The spelling of 28232615 in words is "twenty-eight million, two hundred thirty-two thousand, six hundred fifteen".