28484740 has 12 divisors (see below), whose sum is σ = 59817996. Its totient is φ = 11393888.

The previous prime is 28484719. The next prime is 28484747. The reversal of 28484740 is 4748482.

It can be written as a sum of positive squares in 2 ways, for example, as 5271616 + 23213124 = 2296^2 + 4818^2 .

It is a super-2 number, since 2×28484740² = 1622760825735200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28484740.

It is not an unprimeable number, because it can be changed into a prime (28484747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712099 + ... + 712138.

It is an arithmetic number, because the mean of its divisors is an integer number (4984833).

Almost surely, 2^28484740 is an apocalyptic number.

28484740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28484740 is an abundant number, since it is smaller than the sum of its proper divisors (31333256).

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

28484740 is a wasteful number, since it uses less digits than its factorization.

28484740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424246 (or 1424244 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 28484740 is about 5337.1097046997. The cubic root of 28484740 is about 305.4012098842.

The spelling of 28484740 in words is "twenty-eight million, four hundred eighty-four thousand, seven hundred forty".