28660378 has 16 divisors (see below), whose sum is σ = 43675200. Its totient is φ = 14103936.

The previous prime is 28660367. The next prime is 28660393. The reversal of 28660378 is 87306682.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28660378.

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 7 ways as a sum of consecutive naturals, for example, 42250 + ... + 42922.

It is an arithmetic number, because the mean of its divisors is an integer number (2729700).

Almost surely, 2^28660378 is an apocalyptic number.

28660378 is a deficient number, since it is larger than the sum of its proper divisors (15014822).

28660378 is a wasteful number, since it uses less digits than its factorization.

28660378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28660378 is about 5353.5388295967. The cubic root of 28660378 is about 306.0276293277.

The spelling of 28660378 in words is "twenty-eight million, six hundred sixty thousand, three hundred seventy-eight".