28672078 has 4 divisors (see below), whose sum is σ = 43008120. Its totient is φ = 14336038.

The previous prime is 28672073. The next prime is 28672093. The reversal of 28672078 is 87027682.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28672078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28672073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7168018 + ... + 7168021.

It is an arithmetic number, because the mean of its divisors is an integer number (10752030).

Almost surely, 2^28672078 is an apocalyptic number.

28672078 is a deficient number, since it is larger than the sum of its proper divisors (14336042).

28672078 is a wasteful number, since it uses less digits than its factorization.

28672078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14336041.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 28672078 is about 5354.6314532375. The cubic root of 28672078 is about 306.0692667891.

The spelling of 28672078 in words is "twenty-eight million, six hundred seventy-two thousand, seventy-eight".