402646 has 8 divisors (see below), whose sum is σ = 609840. Its totient is φ = 199368.

The previous prime is 402631. The next prime is 402691. The reversal of 402646 is 646204.

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

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706 + ... + 1141.

It is an arithmetic number, because the mean of its divisors is an integer number (76230).

2⁴⁰²⁶⁴⁶ is an apocalyptic number.

402646 is a deficient number, since it is larger than the sum of its proper divisors (207194).

402646 is a wasteful number, since it uses less digits than its factorization.

402646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 402646 is about 634.5439307093. The cubic root of 402646 is about 73.8427388356.

The spelling of 402646 in words is "four hundred two thousand, six hundred forty-six".