28740313 has 8 divisors (see below), whose sum is σ = 33516800. Its totient is φ = 24634260.

The previous prime is 28740311. The next prime is 28740329. The reversal of 28740313 is 31304782.

It is not a de Polignac number, because 28740313 - 2¹ = 28740311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28740311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41553 + ... + 42238.

It is an arithmetic number, because the mean of its divisors is an integer number (4189600).

Almost surely, 2^28740313 is an apocalyptic number.

It is an amenable number.

28740313 is a deficient number, since it is larger than the sum of its proper divisors (4776487).

28740313 is an frugal number, since it uses more digits than its factorization.

28740313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83812 (or 83798 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28740313 is about 5360.9992538705. Note that the first 3 decimals coincide. The cubic root of 28740313 is about 306.3118732129.

The spelling of 28740313 in words is "twenty-eight million, seven hundred forty thousand, three hundred thirteen".