402478 has 8 divisors (see below), whose sum is σ = 613800. Its totient is φ = 197880.

The previous prime is 402443. The next prime is 402487. The reversal of 402478 is 874204.

402478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

402478 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 3 ways as a sum of consecutive naturals, for example, 1528 + ... + 1771.

It is an arithmetic number, because the mean of its divisors is an integer number (76725).

2⁴⁰²⁴⁷⁸ is an apocalyptic number.

402478 is a deficient number, since it is larger than the sum of its proper divisors (211322).

402478 is a wasteful number, since it uses less digits than its factorization.

402478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 402478 is about 634.4115383566. The cubic root of 402478 is about 73.8324673598.

The spelling of 402478 in words is "four hundred two thousand, four hundred seventy-eight".