28048737 has 4 divisors (see below), whose sum is σ = 37398320. Its totient is φ = 18699156.

The previous prime is 28048729. The next prime is 28048739. The reversal of 28048737 is 73784082.

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 not a de Polignac number, because 28048737 - 2³ = 28048729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28048695 and 28048704.

It is not an unprimeable number, because it can be changed into a prime (28048739) 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, 4674787 + ... + 4674792.

It is an arithmetic number, because the mean of its divisors is an integer number (9349580).

Almost surely, 2^28048737 is an apocalyptic number.

It is an amenable number.

28048737 is a deficient number, since it is larger than the sum of its proper divisors (9349583).

28048737 is an equidigital number, since it uses as much as digits as its factorization.

28048737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9349582.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 28048737 is about 5296.1058335347. The cubic root of 28048737 is about 303.8349786793.

The spelling of 28048737 in words is "twenty-eight million, forty-eight thousand, seven hundred thirty-seven".