400378 has 8 divisors (see below), whose sum is σ = 655200. Its totient is φ = 181980.

The previous prime is 400339. The next prime is 400381. The reversal of 400378 is 873004.

400378 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 Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 18199 = 400378 / (4 + 0 + 0 + 3 + 7 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9078 + ... + 9121.

It is an arithmetic number, because the mean of its divisors is an integer number (81900).

2⁴⁰⁰³⁷⁸ is an apocalyptic number.

400378 is a deficient number, since it is larger than the sum of its proper divisors (254822).

400378 is a wasteful number, since it uses less digits than its factorization.

400378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18212.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 400378 is about 632.7542967061. The cubic root of 400378 is about 73.7038320641.

The spelling of 400378 in words is "four hundred thousand, three hundred seventy-eight".