402678 has 16 divisors (see below), whose sum is σ = 894960. Its totient is φ = 134208.

The previous prime is 402631. The next prime is 402691. The reversal of 402678 is 876204.

402678 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (27).

402678 is an undulating number in base 14.

It is a congruent number.

It is an unprimeable number.

402678 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3675 + ... + 3782.

It is an arithmetic number, because the mean of its divisors is an integer number (55935).

2⁴⁰²⁶⁷⁸ is an apocalyptic number.

402678 is an abundant number, since it is smaller than the sum of its proper divisors (492282).

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

402678 is a wasteful number, since it uses less digits than its factorization.

402678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468 (or 7462 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 402678 is about 634.5691451686. The cubic root of 402678 is about 73.8446949832.

It can be divided in two parts, 4026 and 78, that multiplied together give a triangular number (314028 = T₇₉₂).

The spelling of 402678 in words is "four hundred two thousand, six hundred seventy-eight".