403646 has 4 divisors (see below), whose sum is σ = 605472. Its totient is φ = 201822.

The previous prime is 403621. The next prime is 403649. The reversal of 403646 is 646304.

It is a semiprime because it is the product of two primes.

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 403646.

It is not an unprimeable number, because it can be changed into a prime (403649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100910 + ... + 100913.

It is an arithmetic number, because the mean of its divisors is an integer number (151368).

2⁴⁰³⁶⁴⁶ is an apocalyptic number.

403646 is a deficient number, since it is larger than the sum of its proper divisors (201826).

403646 is a wasteful number, since it uses less digits than its factorization.

403646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201825.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 403646 is about 635.3314095809. The cubic root of 403646 is about 73.9038195300.

The spelling of 403646 in words is "four hundred three thousand, six hundred forty-six".