28514778 has 16 divisors (see below), whose sum is σ = 57105120. Its totient is φ = 9492336.

The previous prime is 28514777. The next prime is 28514789. The reversal of 28514778 is 87741582.

It is not an unprimeable number, because it can be changed into a prime (28514771) 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, 2553 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (3569070).

Almost surely, 2^28514778 is an apocalyptic number.

28514778 is an abundant number, since it is smaller than the sum of its proper divisors (28590342).

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

28514778 is a wasteful number, since it uses less digits than its factorization.

28514778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6301.

The product of its digits is 125440, while the sum is 42.

The square root of 28514778 is about 5339.9230331532. The cubic root of 28514778 is about 305.5085237045.

It can be divided in two parts, 28514 and 778, that added together give a palindrome (29292).

The spelling of 28514778 in words is "twenty-eight million, five hundred fourteen thousand, seven hundred seventy-eight".