28317340 has 24 divisors (see below), whose sum is σ = 61518240. Its totient is φ = 10936128.

The previous prime is 28317337. The next prime is 28317343. The reversal of 28317340 is 4371382.

It is an interprime number because it is at equal distance from previous prime (28317337) and next prime (28317343).

It is a junction number, because it is equal to n+sod(n) for n = 28317299 and 28317308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317343) 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, 23832 + ... + 24991.

It is an arithmetic number, because the mean of its divisors is an integer number (2563260).

Almost surely, 2^28317340 is an apocalyptic number.

28317340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28317340 is an abundant number, since it is smaller than the sum of its proper divisors (33200900).

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

28317340 is a wasteful number, since it uses less digits than its factorization.

28317340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48861 (or 48859 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 28317340 is about 5321.4039500869. The cubic root of 28317340 is about 304.8017703229.

The spelling of 28317340 in words is "twenty-eight million, three hundred seventeen thousand, three hundred forty".