28302340 has 48 divisors (see below), whose sum is σ = 65520000. Its totient is φ = 10183680.

The previous prime is 28302311. The next prime is 28302367. The reversal of 28302340 is 4320382.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 22036 + ... + 23284.

It is an arithmetic number, because the mean of its divisors is an integer number (1365000).

Almost surely, 2^28302340 is an apocalyptic number.

28302340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28302340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32760000).

28302340 is an abundant number, since it is smaller than the sum of its proper divisors (37217660).

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

28302340 is a wasteful number, since it uses less digits than its factorization.

28302340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 28302340 is about 5319.9943608993. The cubic root of 28302340 is about 304.7479418904.

The spelling of 28302340 in words is "twenty-eight million, three hundred two thousand, three hundred forty".