402178 has 16 divisors (see below), whose sum is σ = 720000. Its totient is φ = 164736.

The previous prime is 402139. The next prime is 402197. The reversal of 402178 is 871204.

402178 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 303 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (45000).

2⁴⁰²¹⁷⁸ is an apocalyptic number.

402178 is a deficient number, since it is larger than the sum of its proper divisors (317822).

402178 is a wasteful number, since it uses less digits than its factorization.

402178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 402178 is about 634.1750546970. The cubic root of 402178 is about 73.8141183272.

The spelling of 402178 in words is "four hundred two thousand, one hundred seventy-eight".