28863746 has 4 divisors (see below), whose sum is σ = 43295622. Its totient is φ = 14431872.

The previous prime is 28863743. The next prime is 28863749. The reversal of 28863746 is 64736882.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28863743) and next prime (28863749).

It can be written as a sum of positive squares in only one way, i.e., 22934521 + 5929225 = 4789^2 + 2435^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28863697 and 28863706.

It is not an unprimeable number, because it can be changed into a prime (28863743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7215935 + ... + 7215938.

Almost surely, 2^28863746 is an apocalyptic number.

28863746 is a deficient number, since it is larger than the sum of its proper divisors (14431876).

28863746 is a wasteful number, since it uses less digits than its factorization.

28863746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14431875.

The product of its digits is 387072, while the sum is 44.

The square root of 28863746 is about 5372.4990460679. The cubic root of 28863746 is about 306.7497598295.

The spelling of 28863746 in words is "twenty-eight million, eight hundred sixty-three thousand, seven hundred forty-six".