400380371 has 4 divisors (see below), whose sum is σ = 400592232. Its totient is φ = 400168512.

The previous prime is 400380361. The next prime is 400380377. The reversal of 400380371 is 173083004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400380371 - 2²² = 396186067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400380371.

It is not an unprimeable number, because it can be changed into a prime (400380377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103070 + ... + 106883.

It is an arithmetic number, because the mean of its divisors is an integer number (100148058).

Almost surely, 2^400380371 is an apocalyptic number.

400380371 is a deficient number, since it is larger than the sum of its proper divisors (211861).

400380371 is a wasteful number, since it uses less digits than its factorization.

400380371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211860.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 400380371 is about 20009.5070154164. The cubic root of 400380371 is about 737.0397755284.

The spelling of 400380371 in words is "four hundred million, three hundred eighty thousand, three hundred seventy-one".