28840308 has 24 divisors (see below), whose sum is σ = 76907712. Its totient is φ = 8240064.

The previous prime is 28840307. The next prime is 28840319. The reversal of 28840308 is 80304882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840307) by changing a digit.

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, 171585 + ... + 171752.

It is an arithmetic number, because the mean of its divisors is an integer number (3204488).

Almost surely, 2^28840308 is an apocalyptic number.

28840308 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28840308 is an abundant number, since it is smaller than the sum of its proper divisors (48067404).

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

28840308 is a wasteful number, since it uses less digits than its factorization.

28840308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343351 (or 343349 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28840308 is about 5370.3173090610. The cubic root of 28840308 is about 306.6667081495. Note that the first 3 decimals are identical.

The spelling of 28840308 in words is "twenty-eight million, eight hundred forty thousand, three hundred eight".