28298740 has 24 divisors (see below), whose sum is σ = 62012160. Its totient is φ = 10827168.

The previous prime is 28298737. The next prime is 28298741. The reversal of 28298740 is 4789282.

It is a junction number, because it is equal to n+sod(n) for n = 28298693 and 28298702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28298741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30300 + ... + 31219.

It is an arithmetic number, because the mean of its divisors is an integer number (2583840).

Almost surely, 2^28298740 is an apocalyptic number.

28298740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28298740 is an abundant number, since it is smaller than the sum of its proper divisors (33713420).

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

28298740 is a wasteful number, since it uses less digits than its factorization.

28298740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61551 (or 61549 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 28298740 is about 5319.6560039160. The cubic root of 28298740 is about 304.7350202367.

The spelling of 28298740 in words is "twenty-eight million, two hundred ninety-eight thousand, seven hundred forty".