28342520 has 16 divisors (see below), whose sum is σ = 63770760. Its totient is φ = 11336992.

The previous prime is 28342511. The next prime is 28342529. The reversal of 28342520 is 2524382.

It is an interprime number because it is at equal distance from previous prime (28342511) and next prime (28342529).

It is a self number, because there is not a number n which added to its sum of digits gives 28342520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28342529) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 354242 + ... + 354321.

Almost surely, 2^28342520 is an apocalyptic number.

28342520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28342520 is an abundant number, since it is smaller than the sum of its proper divisors (35428240).

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

28342520 is a wasteful number, since it uses less digits than its factorization.

28342520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708574 (or 708570 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28342520 is about 5323.7693413596. The cubic root of 28342520 is about 304.8920875965.

The spelling of 28342520 in words is "twenty-eight million, three hundred forty-two thousand, five hundred twenty".