28165408 has 48 divisors (see below), whose sum is σ = 57746304. Its totient is φ = 13512960.

The previous prime is 28165381. The next prime is 28165411. The reversal of 28165408 is 80456182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91591 + ... + 91897.

It is an arithmetic number, because the mean of its divisors is an integer number (1203048).

Almost surely, 2^28165408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28165408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28873152).

28165408 is an abundant number, since it is smaller than the sum of its proper divisors (29580896).

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

28165408 is a wasteful number, since it uses less digits than its factorization.

28165408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28165408 is about 5307.1091942789. The cubic root of 28165408 is about 304.2556713405.

The spelling of 28165408 in words is "twenty-eight million, one hundred sixty-five thousand, four hundred eight".