28338040 has 32 divisors (see below), whose sum is σ = 64968480. Its totient is φ = 11120512.

The previous prime is 28337983. The next prime is 28338049. The reversal of 28338040 is 4083382.

It is a super-2 number, since 2×28338040² = 1606089022083200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4564 + ... + 8803.

It is an arithmetic number, because the mean of its divisors is an integer number (2030265).

Almost surely, 2^28338040 is an apocalyptic number.

28338040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28338040 is an abundant number, since it is smaller than the sum of its proper divisors (36630440).

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

28338040 is a wasteful number, since it uses less digits than its factorization.

28338040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13431 (or 13427 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28338040 is about 5323.3485702141. The cubic root of 28338040 is about 304.8760223522.

The spelling of 28338040 in words is "twenty-eight million, three hundred thirty-eight thousand, forty".