28401205 has 16 divisors (see below), whose sum is σ = 40644864. Its totient is φ = 18627840.

The previous prime is 28401167. The next prime is 28401221. The reversal of 28401205 is 50210482.

It is not a de Polignac number, because 28401205 - 2¹⁵ = 28368437 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, 16836 + ... + 18445.

It is an arithmetic number, because the mean of its divisors is an integer number (2540304).

Almost surely, 2^28401205 is an apocalyptic number.

It is an amenable number.

28401205 is a deficient number, since it is larger than the sum of its proper divisors (12243659).

28401205 is a wasteful number, since it uses less digits than its factorization.

28401205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35316.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 28401205 is about 5329.2780937009. The cubic root of 28401205 is about 305.1023753796.

Adding to 28401205 its reverse (50210482), we get a palindrome (78611687).

The spelling of 28401205 in words is "twenty-eight million, four hundred one thousand, two hundred five".