402285381 has 8 divisors (see below), whose sum is σ = 537797280. Its totient is φ = 267481872.

The previous prime is 402285379. The next prime is 402285391. The reversal of 402285381 is 183582204.

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

It is not a de Polignac number, because 402285381 - 2¹ = 402285379 is a prime.

It is a super-2 number, since 2×402285381² = 323667055532630322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402285371) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 175770 + ... + 178043.

It is an arithmetic number, because the mean of its divisors is an integer number (67224660).

Almost surely, 2^402285381 is an apocalyptic number.

It is an amenable number.

402285381 is a deficient number, since it is larger than the sum of its proper divisors (135511899).

402285381 is a wasteful number, since it uses less digits than its factorization.

402285381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354195.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 402285381 is about 20057.0531484563. The cubic root of 402285381 is about 738.2068716697.

The spelling of 402285381 in words is "four hundred two million, two hundred eighty-five thousand, three hundred eighty-one".