28346740 has 12 divisors (see below), whose sum is σ = 59528196. Its totient is φ = 11338688.

The previous prime is 28346729. The next prime is 28346743. The reversal of 28346740 is 4764382.

It can be written as a sum of positive squares in 2 ways, for example, as 10419984 + 17926756 = 3228^2 + 4234^2 .

It is a super-3 number, since 3×28346740³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28346696 and 28346705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28346743) 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 3 ways as a sum of consecutive naturals, for example, 708649 + ... + 708688.

It is an arithmetic number, because the mean of its divisors is an integer number (4960683).

Almost surely, 2^28346740 is an apocalyptic number.

28346740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28346740 is an abundant number, since it is smaller than the sum of its proper divisors (31181456).

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

28346740 is a wasteful number, since it uses less digits than its factorization.

28346740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417346 (or 1417344 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 28346740 is about 5324.1656623362. The cubic root of 28346740 is about 304.9072189346.

The spelling of 28346740 in words is "twenty-eight million, three hundred forty-six thousand, seven hundred forty".