284138725 has 24 divisors (see below), whose sum is σ = 389705960. Its totient is φ = 204145920.

The previous prime is 284138717. The next prime is 284138737. The reversal of 284138725 is 527831482.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 156200004 + 127938721 = 12498^2 + 11311^2 .

It is not a de Polignac number, because 284138725 - 2³ = 284138717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211 + ... + 23839.

Almost surely, 2^284138725 is an apocalyptic number.

284138725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

284138725 is a deficient number, since it is larger than the sum of its proper divisors (105567235).

284138725 is a wasteful number, since it uses less digits than its factorization.

284138725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23689 (or 23684 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 284138725 is about 16856.4149509912. The cubic root of 284138725 is about 657.4208533838.

The spelling of 284138725 in words is "two hundred eighty-four million, one hundred thirty-eight thousand, seven hundred twenty-five".