28346385 has 32 divisors (see below), whose sum is σ = 48384000. Its totient is φ = 14129856.

The previous prime is 28346371. The next prime is 28346387. The reversal of 28346385 is 58364382.

It is not a de Polignac number, because 28346385 - 2¹⁵ = 28313617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28346387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21886 + ... + 23144.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000).

Almost surely, 2^28346385 is an apocalyptic number.

It is an amenable number.

28346385 is a deficient number, since it is larger than the sum of its proper divisors (20037615).

28346385 is a wasteful number, since it uses less digits than its factorization.

28346385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365.

The product of its digits is 138240, while the sum is 39.

The square root of 28346385 is about 5324.1323236749. The cubic root of 28346385 is about 304.9059460956.

The spelling of 28346385 in words is "twenty-eight million, three hundred forty-six thousand, three hundred eighty-five".