28978710 has 32 divisors (see below), whose sum is σ = 73641312. Its totient is φ = 7272960.

The previous prime is 28978681. The next prime is 28978723. The reversal of 28978710 is 1787982.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 27901 + ... + 28920.

It is an arithmetic number, because the mean of its divisors is an integer number (2301291).

Almost surely, 2^28978710 is an apocalyptic number.

28978710 is an abundant number, since it is smaller than the sum of its proper divisors (44662602).

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

28978710 is a wasteful number, since it uses less digits than its factorization.

28978710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56848.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 28978710 is about 5383.1877173288. The cubic root of 28978710 is about 307.1564806855.

The spelling of 28978710 in words is "twenty-eight million, nine hundred seventy-eight thousand, seven hundred ten".