28620015 has 32 divisors (see below), whose sum is σ = 47312640. Its totient is φ = 14766336.

The previous prime is 28619957. The next prime is 28620017. The reversal of 28620015 is 51002682.

It is not a de Polignac number, because 28620015 - 2⁶ = 28619951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64384 + ... + 64826.

It is an arithmetic number, because the mean of its divisors is an integer number (1478520).

Almost surely, 2^28620015 is an apocalyptic number.

28620015 is a deficient number, since it is larger than the sum of its proper divisors (18692625).

28620015 is a wasteful number, since it uses less digits than its factorization.

28620015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28620015 is about 5349.7677519683. The cubic root of 28620015 is about 305.8839001655.

Adding to 28620015 its reverse (51002682), we get a palindrome (79622697).

It can be divided in two parts, 286 and 20015, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 28620015 in words is "twenty-eight million, six hundred twenty thousand, fifteen".