28323413 has 4 divisors (see below), whose sum is σ = 28546560. Its totient is φ = 28100268.

The previous prime is 28323409. The next prime is 28323437. The reversal of 28323413 is 31432382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31432382 = 2 ⋅15716191.

It is a cyclic number.

It is not a de Polignac number, because 28323413 - 2² = 28323409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28323473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111383 + ... + 111636.

It is an arithmetic number, because the mean of its divisors is an integer number (7136640).

Almost surely, 2^28323413 is an apocalyptic number.

It is an amenable number.

28323413 is a deficient number, since it is larger than the sum of its proper divisors (223147).

28323413 is a wasteful number, since it uses less digits than its factorization.

28323413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223146.

The product of its digits is 3456, while the sum is 26.

The square root of 28323413 is about 5321.9745395858. The cubic root of 28323413 is about 304.8235582549.

Adding to 28323413 its reverse (31432382), we get a palindrome (59755795).

The spelling of 28323413 in words is "twenty-eight million, three hundred twenty-three thousand, four hundred thirteen".