28633605 has 64 divisors (see below), whose sum is σ = 61544448. Its totient is φ = 10978560.

The previous prime is 28633567. The next prime is 28633607. The reversal of 28633605 is 50633682.

It is not a de Polignac number, because 28633605 - 2¹⁷ = 28502533 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 (28633607) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14062 + ... + 15968.

It is an arithmetic number, because the mean of its divisors is an integer number (961632).

Almost surely, 2^28633605 is an apocalyptic number.

It is an amenable number.

28633605 is an abundant number, since it is smaller than the sum of its proper divisors (32910843).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28633605 is a wasteful number, since it uses less digits than its factorization.

28633605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 28633605 is about 5351.0377498201. The cubic root of 28633605 is about 305.9323080647.

The spelling of 28633605 in words is "twenty-eight million, six hundred thirty-three thousand, six hundred five".