28722678 has 16 divisors (see below), whose sum is σ = 59298816. Its totient is φ = 9265320.

The previous prime is 28722677. The next prime is 28722689. The reversal of 28722678 is 87622782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28722677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77026 + ... + 77397.

It is an arithmetic number, because the mean of its divisors is an integer number (3706176).

Almost surely, 2^28722678 is an apocalyptic number.

28722678 is an abundant number, since it is smaller than the sum of its proper divisors (30576138).

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

28722678 is a wasteful number, since it uses less digits than its factorization.

28722678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154459.

The product of its digits is 150528, while the sum is 42.

The square root of 28722678 is about 5359.3542521464. The cubic root of 28722678 is about 306.2492096051.

The spelling of 28722678 in words is "twenty-eight million, seven hundred twenty-two thousand, six hundred seventy-eight".