284390397 has 6 divisors (see below), whose sum is σ = 410786142. Its totient is φ = 189593592.

The previous prime is 284390387. The next prime is 284390401. The reversal of 284390397 is 793093482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 166255236 + 118135161 = 12894^2 + 10869^2 .

It is not a de Polignac number, because 284390397 - 2¹⁶ = 284324861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284390317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15799458 + ... + 15799475.

It is an arithmetic number, because the mean of its divisors is an integer number (68464357).

Almost surely, 2^284390397 is an apocalyptic number.

It is an amenable number.

284390397 is a deficient number, since it is larger than the sum of its proper divisors (126395745).

284390397 is a wasteful number, since it uses less digits than its factorization.

284390397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31598939 (or 31598936 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 284390397 is about 16863.8784684900. The cubic root of 284390397 is about 657.6148966225.

The spelling of 284390397 in words is "two hundred eighty-four million, three hundred ninety thousand, three hundred ninety-seven".