28834040 has 32 divisors (see below), whose sum is σ = 68694480. Its totient is φ = 10854912.

The previous prime is 28834009. The next prime is 28834073. The reversal of 28834040 is 4043882.

It is a junction number, because it is equal to n+sod(n) for n = 28833994 and 28834012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20522 + ... + 21881.

Almost surely, 2^28834040 is an apocalyptic number.

28834040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28834040 is an abundant number, since it is smaller than the sum of its proper divisors (39860440).

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

28834040 is a wasteful number, since it uses less digits than its factorization.

28834040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42431 (or 42427 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 28834040 is about 5369.7336991698. The cubic root of 28834040 is about 306.6444900998.

The spelling of 28834040 in words is "twenty-eight million, eight hundred thirty-four thousand, forty".