28078502 has 8 divisors (see below), whose sum is σ = 42330000. Its totient is φ = 13968504.

The previous prime is 28078487. The next prime is 28078541. The reversal of 28078502 is 20587082.

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

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 3 ways as a sum of consecutive naturals, for example, 34877 + ... + 35672.

It is an arithmetic number, because the mean of its divisors is an integer number (5291250).

Almost surely, 2^28078502 is an apocalyptic number.

28078502 is a deficient number, since it is larger than the sum of its proper divisors (14251498).

28078502 is a wasteful number, since it uses less digits than its factorization.

28078502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70750.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 28078502 is about 5298.9151719951. The cubic root of 28078502 is about 303.9424160899.

The spelling of 28078502 in words is "twenty-eight million, seventy-eight thousand, five hundred two".