28413513 has 6 divisors (see below), whose sum is σ = 41041754. Its totient is φ = 18942336.

The previous prime is 28413509. The next prime is 28413523. The reversal of 28413513 is 31531482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25130169 + 3283344 = 5013^2 + 1812^2 .

It is not a de Polignac number, because 28413513 - 2² = 28413509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28413523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1578520 + ... + 1578537.

Almost surely, 2^28413513 is an apocalyptic number.

It is an amenable number.

28413513 is a deficient number, since it is larger than the sum of its proper divisors (12628241).

28413513 is a wasteful number, since it uses less digits than its factorization.

28413513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157063 (or 3157060 counting only the distinct ones).

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

The square root of 28413513 is about 5330.4327216465. The cubic root of 28413513 is about 305.1464422624.

Adding to 28413513 its reverse (31531482), we get a palindrome (59944995).

The spelling of 28413513 in words is "twenty-eight million, four hundred thirteen thousand, five hundred thirteen".