28801413 has 10 divisors (see below), whose sum is σ = 43024454. Its totient is φ = 19200888.

The previous prime is 28801361. The next prime is 28801439. The reversal of 28801413 is 31410882.

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 11512449 = 4158^2 + 3393^2 .

It is not a de Polignac number, because 28801413 - 2¹⁶ = 28735877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28801483) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 177706 + ... + 177867.

Almost surely, 2^28801413 is an apocalyptic number.

It is an amenable number.

28801413 is a deficient number, since it is larger than the sum of its proper divisors (14223041).

28801413 is an equidigital number, since it uses as much as digits as its factorization.

28801413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355585 (or 355576 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28801413 is about 5366.6947928870. The cubic root of 28801413 is about 306.5287858163.

The spelling of 28801413 in words is "twenty-eight million, eight hundred one thousand, four hundred thirteen".