28484425 has 12 divisors (see below), whose sum is σ = 35648140. Its totient is φ = 22576320.

The previous prime is 28484411. The next prime is 28484429. The reversal of 28484425 is 52448482.

It can be written as a sum of positive squares in 6 ways, for example, as 2229049 + 26255376 = 1493^2 + 5124^2 .

It is not a de Polignac number, because 28484425 - 2¹³ = 28476233 is a prime.

It is a super-3 number, since 3×28484425³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28484429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2502 + ... + 7951.

Almost surely, 2^28484425 is an apocalyptic number.

28484425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28484425 is a deficient number, since it is larger than the sum of its proper divisors (7163715).

28484425 is a wasteful number, since it uses less digits than its factorization.

28484425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572 (or 10567 counting only the distinct ones).

The product of its digits is 81920, while the sum is 37.

The square root of 28484425 is about 5337.0801942635. The cubic root of 28484425 is about 305.4000841150.

The spelling of 28484425 in words is "twenty-eight million, four hundred eighty-four thousand, four hundred twenty-five".