28294723 has 6 divisors (see below), whose sum is σ = 29237892. Its totient is φ = 27381060.

The previous prime is 28294699. The next prime is 28294729. The reversal of 28294723 is 32749282.

It is a de Polignac number, because none of the positive numbers 2^k-28294723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28294729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13761 + ... + 15682.

It is an arithmetic number, because the mean of its divisors is an integer number (4872982).

Almost surely, 2^28294723 is an apocalyptic number.

28294723 is a deficient number, since it is larger than the sum of its proper divisors (943169).

28294723 is an equidigital number, since it uses as much as digits as its factorization.

28294723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29505 (or 29474 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 28294723 is about 5319.2784285089. The cubic root of 28294723 is about 304.7206005310.

The spelling of 28294723 in words is "twenty-eight million, two hundred ninety-four thousand, seven hundred twenty-three".