28050015 has 16 divisors (see below), whose sum is σ = 51291648. Its totient is φ = 12822816.

The previous prime is 28050007. The next prime is 28050037. The reversal of 28050015 is 51005082.

It is not a de Polignac number, because 28050015 - 2³ = 28050007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 28049973 and 28050000.

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, 133467 + ... + 133676.

It is an arithmetic number, because the mean of its divisors is an integer number (3205728).

Almost surely, 2^28050015 is an apocalyptic number.

28050015 is a deficient number, since it is larger than the sum of its proper divisors (23241633).

28050015 is a wasteful number, since it uses less digits than its factorization.

28050015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267158.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 28050015 is about 5296.2264868489. The cubic root of 28050015 is about 303.8395932092.

Adding to 28050015 its reverse (51005082), we get a palindrome (79055097).

The spelling of 28050015 in words is "twenty-eight million, fifty thousand, fifteen".