28661416 has 16 divisors (see below), whose sum is σ = 61417440. Its totient is φ = 12283440.

The previous prime is 28661401. The next prime is 28661447. The reversal of 28661416 is 61416682.

It is an unprimeable number.

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, 255850 + ... + 255961.

It is an arithmetic number, because the mean of its divisors is an integer number (3838590).

Almost surely, 2^28661416 is an apocalyptic number.

It is an amenable number.

28661416 is an abundant number, since it is smaller than the sum of its proper divisors (32756024).

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

28661416 is a wasteful number, since it uses less digits than its factorization.

28661416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511824 (or 511820 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 28661416 is about 5353.6357739391. The cubic root of 28661416 is about 306.0313237759.

The spelling of 28661416 in words is "twenty-eight million, six hundred sixty-one thousand, four hundred sixteen".