284690381 has 8 divisors (see below), whose sum is σ = 301631544. Its totient is φ = 267770880.

The previous prime is 284690377. The next prime is 284690383. The reversal of 284690381 is 183096482.

It can be written as a sum of positive squares in 4 ways, for example, as 26574025 + 258116356 = 5155^2 + 16066^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 284690381 - 2² = 284690377 is a prime.

It is a super-2 number, since 2×284690381² = 162097226067850322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284690383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27371 + ... + 36311.

It is an arithmetic number, because the mean of its divisors is an integer number (37703943).

Almost surely, 2^284690381 is an apocalyptic number.

It is an amenable number.

284690381 is a deficient number, since it is larger than the sum of its proper divisors (16941163).

284690381 is a wasteful number, since it uses less digits than its factorization.

284690381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10831.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 284690381 is about 16872.7704008559. The cubic root of 284690381 is about 657.8460397111.

The spelling of 284690381 in words is "two hundred eighty-four million, six hundred ninety thousand, three hundred eighty-one".