28484340 has 48 divisors (see below), whose sum is σ = 81708480. Its totient is φ = 7409920.

The previous prime is 28484321. The next prime is 28484371. The reversal of 28484340 is 4348482.

It is a super-2 number, since 2×28484340² = 1622715250471200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3330 + ... + 8249.

It is an arithmetic number, because the mean of its divisors is an integer number (1702260).

Almost surely, 2^28484340 is an apocalyptic number.

28484340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28484340 is an abundant number, since it is smaller than the sum of its proper divisors (53224140).

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

28484340 is a wasteful number, since it uses less digits than its factorization.

28484340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11632 (or 11630 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 28484340 is about 5337.0722311020. The cubic root of 28484340 is about 305.3997803345.

The spelling of 28484340 in words is "twenty-eight million, four hundred eighty-four thousand, three hundred forty".