400344411 has 4 divisors (see below), whose sum is σ = 533792552. Its totient is φ = 266896272.

The previous prime is 400344409. The next prime is 400344431. The reversal of 400344411 is 114443004.

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

It is not a de Polignac number, because 400344411 - 2¹ = 400344409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400344401) 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, 66724066 + ... + 66724071.

It is an arithmetic number, because the mean of its divisors is an integer number (133448138).

Almost surely, 2^400344411 is an apocalyptic number.

400344411 is a deficient number, since it is larger than the sum of its proper divisors (133448141).

400344411 is a wasteful number, since it uses less digits than its factorization.

400344411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133448140.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 400344411 is about 20008.6084223766. The cubic root of 400344411 is about 737.0177092253.

Adding to 400344411 its reverse (114443004), we get a palindrome (514787415).

The spelling of 400344411 in words is "four hundred million, three hundred forty-four thousand, four hundred eleven".