28485405 has 32 divisors (see below), whose sum is σ = 54539520. Its totient is φ = 14022720.

The previous prime is 28485397. The next prime is 28485407. The reversal of 28485405 is 50458482.

It is not a de Polignac number, because 28485405 - 2³ = 28485397 is a prime.

It is a super-2 number, since 2×28485405² = 1622836596028050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28485405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485407) 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, 6361 + ... + 9870.

It is an arithmetic number, because the mean of its divisors is an integer number (1704360).

Almost surely, 2^28485405 is an apocalyptic number.

It is an amenable number.

28485405 is a deficient number, since it is larger than the sum of its proper divisors (26054115).

28485405 is a wasteful number, since it uses less digits than its factorization.

28485405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16258 (or 16252 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 28485405 is about 5337.1720039736. The cubic root of 28485405 is about 305.4035864810.

The spelling of 28485405 in words is "twenty-eight million, four hundred eighty-five thousand, four hundred five".