402068 has 6 divisors (see below), whose sum is σ = 703626. Its totient is φ = 201032.

The previous prime is 402053. The next prime is 402071. The reversal of 402068 is 860204.

It can be written as a sum of positive squares in only one way, i.e., 232324 + 169744 = 482^2 + 412^2 .

It is a congruent number.

It is an unprimeable number.

402068 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50255 + ... + 50262.

It is an arithmetic number, because the mean of its divisors is an integer number (117271).

2⁴⁰²⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

402068 is a deficient number, since it is larger than the sum of its proper divisors (301558).

402068 is a wasteful number, since it uses less digits than its factorization.

402068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100521 (or 100519 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 402068 is about 634.0883219237. The cubic root of 402068 is about 73.8073880623.

The spelling of 402068 in words is "four hundred two thousand, sixty-eight".