28402206 has 32 divisors (see below), whose sum is σ = 68739840. Its totient is φ = 7637376.

The previous prime is 28402177. The next prime is 28402219. The reversal of 28402206 is 60220482.

It is a Curzon number.

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, 19176 + ... + 20603.

It is an arithmetic number, because the mean of its divisors is an integer number (2148120).

Almost surely, 2^28402206 is an apocalyptic number.

28402206 is an abundant number, since it is smaller than the sum of its proper divisors (40337634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28402206 is a wasteful number, since it uses less digits than its factorization.

28402206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39808.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 28402206 is about 5329.3720080325. The cubic root of 28402206 is about 305.1059597802.

Adding to 28402206 its reverse (60220482), we get a palindrome (88622688).

The spelling of 28402206 in words is "twenty-eight million, four hundred two thousand, two hundred six".