28059405 has 16 divisors (see below), whose sum is σ = 48976704. Its totient is φ = 13604480.

The previous prime is 28059403. The next prime is 28059407. The reversal of 28059405 is 50495082.

It is an interprime number because it is at equal distance from previous prime (28059403) and next prime (28059407).

It is not a de Polignac number, because 28059405 - 2¹ = 28059403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28059403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84864 + ... + 85193.

It is an arithmetic number, because the mean of its divisors is an integer number (3061044).

Almost surely, 2^28059405 is an apocalyptic number.

It is an amenable number.

28059405 is a deficient number, since it is larger than the sum of its proper divisors (20917299).

28059405 is a wasteful number, since it uses less digits than its factorization.

28059405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170076.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28059405 is about 5297.1128928880. The cubic root of 28059405 is about 303.8734937909.

It can be divided in two parts, 280 and 59405, that added together give a triangular number (59685 = T₃₄₅).

The spelling of 28059405 in words is "twenty-eight million, fifty-nine thousand, four hundred five".