28145908 has 48 divisors (see below), whose sum is σ = 58436224. Its totient is φ = 11612160.

The previous prime is 28145893. The next prime is 28145911. The reversal of 28145908 is 80954182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116668 + ... + 116908.

Almost surely, 2^28145908 is an apocalyptic number.

28145908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28145908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29218112).

28145908 is an abundant number, since it is smaller than the sum of its proper divisors (30290316).

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

28145908 is a wasteful number, since it uses less digits than its factorization.

28145908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28145908 is about 5305.2717178294. The cubic root of 28145908 is about 304.1854391450.

The spelling of 28145908 in words is "twenty-eight million, one hundred forty-five thousand, nine hundred eight".