28405675 has 6 divisors (see below), whose sum is σ = 35223068. Its totient is φ = 22724520.

The previous prime is 28405673. The next prime is 28405679. The reversal of 28405675 is 57650482.

It is a happy number.

It is not a de Polignac number, because 28405675 - 2¹ = 28405673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28405673) 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, 568089 + ... + 568138.

Almost surely, 2^28405675 is an apocalyptic number.

28405675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28405675 is a deficient number, since it is larger than the sum of its proper divisors (6817393).

28405675 is a wasteful number, since it uses less digits than its factorization.

28405675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136237 (or 1136232 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 28405675 is about 5329.6974585806. The cubic root of 28405675 is about 305.1183809925.

It can be divided in two parts, 2840 and 5675, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 28405675 in words is "twenty-eight million, four hundred five thousand, six hundred seventy-five".