402287 has 8 divisors (see below), whose sum is σ = 437760. Its totient is φ = 368280.

The previous prime is 402277. The next prime is 402299. The reversal of 402287 is 782204.

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

It is not a de Polignac number, because 402287 - 2⁶ = 402223 is a prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402287.

It is not an unprimeable number, because it can be changed into a prime (402277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248 + ... + 930.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁴⁰²²⁸⁷ is an apocalyptic number.

402287 is a deficient number, since it is larger than the sum of its proper divisors (35473).

402287 is a wasteful number, since it uses less digits than its factorization.

402287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 402287 is about 634.2609872915. The cubic root of 402287 is about 73.8207861974.

The spelling of 402287 in words is "four hundred two thousand, two hundred eighty-seven".