402078 has 16 divisors (see below), whose sum is σ = 846720. Its totient is φ = 126936.

The previous prime is 402071. The next prime is 402089. The reversal of 402078 is 870204.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1650 + ... + 1877.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2⁴⁰²⁰⁷⁸ is an apocalyptic number.

402078 is an abundant number, since it is smaller than the sum of its proper divisors (444642).

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

402078 is a wasteful number, since it uses less digits than its factorization.

402078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 402078 is about 634.0962072115. The cubic root of 402078 is about 73.8079999553.

The spelling of 402078 in words is "four hundred two thousand, seventy-eight".