28242660 has 24 divisors (see below), whose sum is σ = 79079616. Its totient is φ = 7531360.

The previous prime is 28242653. The next prime is 28242667. The reversal of 28242660 is 6624282.

It is an interprime number because it is at equal distance from previous prime (28242653) and next prime (28242667).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28242667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235296 + ... + 235415.

It is an arithmetic number, because the mean of its divisors is an integer number (3294984).

Almost surely, 2^28242660 is an apocalyptic number.

28242660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28242660 is an abundant number, since it is smaller than the sum of its proper divisors (50836956).

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

28242660 is a wasteful number, since it uses less digits than its factorization.

28242660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470723 (or 470721 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28242660 is about 5314.3823723929. The cubic root of 28242660 is about 304.5335879322.

The spelling of 28242660 in words is "twenty-eight million, two hundred forty-two thousand, six hundred sixty".