400348478 has 4 divisors (see below), whose sum is σ = 600522720. Its totient is φ = 200174238.

The previous prime is 400348463. The next prime is 400348499. The reversal of 400348478 is 874843004.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100087118 + ... + 100087121.

It is an arithmetic number, because the mean of its divisors is an integer number (150130680).

Almost surely, 2^400348478 is an apocalyptic number.

400348478 is a deficient number, since it is larger than the sum of its proper divisors (200174242).

400348478 is a wasteful number, since it uses less digits than its factorization.

400348478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200174241.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 400348478 is about 20008.7100533743. The cubic root of 400348478 is about 737.0202049438.

The spelling of 400348478 in words is "four hundred million, three hundred forty-eight thousand, four hundred seventy-eight".