28827378 has 12 divisors (see below), whose sum is σ = 62459358. Its totient is φ = 9609120.

The previous prime is 28827371. The next prime is 28827397. The reversal of 28827378 is 87372882.

It can be written as a sum of positive squares in only one way, i.e., 15233409 + 13593969 = 3903^2 + 3687^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28827371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 800743 + ... + 800778.

Almost surely, 2^28827378 is an apocalyptic number.

28827378 is an abundant number, since it is smaller than the sum of its proper divisors (33631980).

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

28827378 is a wasteful number, since it uses less digits than its factorization.

28827378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601529 (or 1601526 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 28827378 is about 5369.1133346205. The cubic root of 28827378 is about 306.6208719162.

It can be divided in two parts, 288 and 27378, that multiplied together give a square (7884864 = 2808²).

The spelling of 28827378 in words is "twenty-eight million, eight hundred twenty-seven thousand, three hundred seventy-eight".