28528415 has 16 divisors (see below), whose sum is σ = 35259840. Its totient is φ = 22145280.

The previous prime is 28528387. The next prime is 28528421. The reversal of 28528415 is 51482582.

It is a happy number.

It is not a de Polignac number, because 28528415 - 2⁶ = 28528351 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64766 + ... + 65204.

It is an arithmetic number, because the mean of its divisors is an integer number (2203740).

Almost surely, 2^28528415 is an apocalyptic number.

28528415 is a deficient number, since it is larger than the sum of its proper divisors (6731425).

28528415 is a wasteful number, since it uses less digits than its factorization.

28528415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its digits is 25600, while the sum is 35.

The square root of 28528415 is about 5341.1997715869. The cubic root of 28528415 is about 305.5572184054.

The spelling of 28528415 in words is "twenty-eight million, five hundred twenty-eight thousand, four hundred fifteen".