28351413 has 24 divisors (see below), whose sum is σ = 41801760. Its totient is φ = 18514080.

The previous prime is 28351399. The next prime is 28351417. The reversal of 28351413 is 31415382.

It is a happy number.

It is not a de Polignac number, because 28351413 - 2⁵ = 28351381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28351417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163795 + ... + 163967.

It is an arithmetic number, because the mean of its divisors is an integer number (1741740).

Almost surely, 2^28351413 is an apocalyptic number.

It is an amenable number.

28351413 is a deficient number, since it is larger than the sum of its proper divisors (13450347).

28351413 is a wasteful number, since it uses less digits than its factorization.

28351413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 446 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 28351413 is about 5324.6044923543. The cubic root of 28351413 is about 304.9239728088.

Adding to 28351413 its reverse (31415382), we get a palindrome (59766795).

The spelling of 28351413 in words is "twenty-eight million, three hundred fifty-one thousand, four hundred thirteen".