28644078 has 16 divisors (see below), whose sum is σ = 57465216. Its totient is φ = 9518520.

The previous prime is 28644073. The next prime is 28644089. The reversal of 28644078 is 87044682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28644071) 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, 5226 + ... + 9197.

It is an arithmetic number, because the mean of its divisors is an integer number (3591576).

Almost surely, 2^28644078 is an apocalyptic number.

28644078 is an abundant number, since it is smaller than the sum of its proper divisors (28821138).

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

28644078 is a wasteful number, since it uses less digits than its factorization.

28644078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14759.

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 28644078 is about 5352.0162555807. The cubic root of 28644078 is about 305.9696026877.

The spelling of 28644078 in words is "twenty-eight million, six hundred forty-four thousand, seventy-eight".