28813737 has 4 divisors (see below), whose sum is σ = 38418320. Its totient is φ = 19209156.

The previous prime is 28813723. The next prime is 28813751. The reversal of 28813737 is 73731882.

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.

It is an interprime number because it is at equal distance from previous prime (28813723) and next prime (28813751).

It is not a de Polignac number, because 28813737 - 2¹⁹ = 28289449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28813695 and 28813704.

It is not an unprimeable number, because it can be changed into a prime (28815737) 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, 4802287 + ... + 4802292.

It is an arithmetic number, because the mean of its divisors is an integer number (9604580).

Almost surely, 2^28813737 is an apocalyptic number.

It is an amenable number.

28813737 is a deficient number, since it is larger than the sum of its proper divisors (9604583).

28813737 is an equidigital number, since it uses as much as digits as its factorization.

28813737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9604582.

The product of its digits is 56448, while the sum is 39.

The square root of 28813737 is about 5367.8428628267. The cubic root of 28813737 is about 306.5725003622.

The spelling of 28813737 in words is "twenty-eight million, eight hundred thirteen thousand, seven hundred thirty-seven".