28359405 has 48 divisors (see below), whose sum is σ = 50909040. Its totient is φ = 14598144.

The previous prime is 28359347. The next prime is 28359431. The reversal of 28359405 is 50495382.

It can be written as a sum of positive squares in 8 ways, for example, as 1454436 + 26904969 = 1206^2 + 5187^2 .

It is not a de Polignac number, because 28359405 - 2⁷ = 28359277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28359405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292317 + ... + 292413.

It is an arithmetic number, because the mean of its divisors is an integer number (1060605).

Almost surely, 2^28359405 is an apocalyptic number.

It is an amenable number.

28359405 is a deficient number, since it is larger than the sum of its proper divisors (22549635).

28359405 is a wasteful number, since it uses less digits than its factorization.

28359405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 28359405 is about 5325.3549177496. The cubic root of 28359405 is about 304.9526218623.

The spelling of 28359405 in words is "twenty-eight million, three hundred fifty-nine thousand, four hundred five".