402684 has 24 divisors (see below), whose sum is σ = 981120. Its totient is φ = 128304.

The previous prime is 402631. The next prime is 402691. The reversal of 402684 is 486204.

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 7 ways as a sum of consecutive naturals, for example, 454 + ... + 1005.

It is an arithmetic number, because the mean of its divisors is an integer number (40880).

2⁴⁰²⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

402684 is an abundant number, since it is smaller than the sum of its proper divisors (578436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402684 is a wasteful number, since it uses less digits than its factorization.

402684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1487 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 402684 is about 634.5738727682. The cubic root of 402684 is about 73.8450617493.

Adding to 402684 its reverse (486204), we get a palindrome (888888).

The spelling of 402684 in words is "four hundred two thousand, six hundred eighty-four".