400420311 has 8 divisors (see below), whose sum is σ = 533992704. Its totient is φ = 266897400.

The previous prime is 400420291. The next prime is 400420331. The reversal of 400420311 is 113024004.

It is an interprime number because it is at equal distance from previous prime (400420291) and next prime (400420331).

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

It is not a de Polignac number, because 400420311 - 2⁷ = 400420183 is a prime.

It is a super-2 number, since 2×400420311² = 320672850922673442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400420331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15460 + ... + 32246.

It is an arithmetic number, because the mean of its divisors is an integer number (66749088).

Almost surely, 2^400420311 is an apocalyptic number.

400420311 is a deficient number, since it is larger than the sum of its proper divisors (133572393).

400420311 is a wasteful number, since it uses less digits than its factorization.

400420311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24741.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 400420311 is about 20010.5050161159. The cubic root of 400420311 is about 737.0642825489.

Adding to 400420311 its reverse (113024004), we get a palindrome (513444315).

The spelling of 400420311 in words is "four hundred million, four hundred twenty thousand, three hundred eleven".