28841680 has 40 divisors (see below), whose sum is σ = 76637952. Its totient is φ = 9888384.

The previous prime is 28841671. The next prime is 28841711. The reversal of 28841680 is 8614882.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

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, 25192 + ... + 26311.

Almost surely, 2^28841680 is an apocalyptic number.

28841680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28841680 is an abundant number, since it is smaller than the sum of its proper divisors (47796272).

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

28841680 is a wasteful number, since it uses less digits than its factorization.

28841680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51523 (or 51517 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 28841680 is about 5370.4450467350. The cubic root of 28841680 is about 306.6715710201.

The spelling of 28841680 in words is "twenty-eight million, eight hundred forty-one thousand, six hundred eighty".