28980642 has 8 divisors (see below), whose sum is σ = 57961296. Its totient is φ = 9660212.

The previous prime is 28980641. The next prime is 28980647. The reversal of 28980642 is 24608982.

It is a sphenic number, since it is the product of 3 distinct primes.

28980642 is an admirable number.

It is a super-2 number, since 2×28980642² = 1679755221464328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28980642.

It is not an unprimeable number, because it can be changed into a prime (28980641) 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, 2415048 + ... + 2415059.

It is an arithmetic number, because the mean of its divisors is an integer number (7245162).

Almost surely, 2^28980642 is an apocalyptic number.

28980642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28980642 is a wasteful number, since it uses less digits than its factorization.

28980642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830112.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28980642 is about 5383.3671619164. The cubic root of 28980642 is about 307.1633065372.

The spelling of 28980642 in words is "twenty-eight million, nine hundred eighty thousand, six hundred forty-two".