28261678 has 16 divisors (see below), whose sum is σ = 42981840. Its totient is φ = 13936000.

The previous prime is 28261657. The next prime is 28261693. The reversal of 28261678 is 87616282.

It is a self number, because there is not a number n which added to its sum of digits gives 28261678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70278 + ... + 70678.

It is an arithmetic number, because the mean of its divisors is an integer number (2686365).

Almost surely, 2^28261678 is an apocalyptic number.

28261678 is a deficient number, since it is larger than the sum of its proper divisors (14720162).

28261678 is a wasteful number, since it uses less digits than its factorization.

28261678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803.

The product of its digits is 64512, while the sum is 40.

The square root of 28261678 is about 5316.1713666886. The cubic root of 28261678 is about 304.6019280516.

The spelling of 28261678 in words is "twenty-eight million, two hundred sixty-one thousand, six hundred seventy-eight".