28984925 has 6 divisors (see below), whose sum is σ = 35941338. Its totient is φ = 23187920.

The previous prime is 28984913. The next prime is 28984927. The reversal of 28984925 is 52948982.

It can be written as a sum of positive squares in 3 ways, for example, as 190969 + 28793956 = 437^2 + 5366^2 .

It is not a de Polignac number, because 28984925 - 2¹⁶ = 28919389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28984925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28984927) 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, 579674 + ... + 579723.

It is an arithmetic number, because the mean of its divisors is an integer number (5990223).

Almost surely, 2^28984925 is an apocalyptic number.

28984925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28984925 is a deficient number, since it is larger than the sum of its proper divisors (6956413).

28984925 is a wasteful number, since it uses less digits than its factorization.

28984925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159407 (or 1159402 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 28984925 is about 5383.7649465778. The cubic root of 28984925 is about 307.1784375068.

The spelling of 28984925 in words is "twenty-eight million, nine hundred eighty-four thousand, nine hundred twenty-five".