28887413 has 4 divisors (see below), whose sum is σ = 29038848. Its totient is φ = 28735980.

The previous prime is 28887407. The next prime is 28887449. The reversal of 28887413 is 31478882.

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: 31478882 = 2 ⋅15739441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28887413 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 (28887613) 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, 75431 + ... + 75812.

It is an arithmetic number, because the mean of its divisors is an integer number (7259712).

Almost surely, 2^28887413 is an apocalyptic number.

It is an amenable number.

28887413 is a deficient number, since it is larger than the sum of its proper divisors (151435).

28887413 is a wasteful number, since it uses less digits than its factorization.

28887413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151434.

The product of its digits is 86016, while the sum is 41.

The square root of 28887413 is about 5374.7012009971. The cubic root of 28887413 is about 306.8335773541.

It can be divided in two parts, 2888 and 7413, that added together give a palindrome (10301).

The spelling of 28887413 in words is "twenty-eight million, eight hundred eighty-seven thousand, four hundred thirteen".