400771 has 6 divisors (see below), whose sum is σ = 466260. Its totient is φ = 343476.

The previous prime is 400759. The next prime is 400823. The reversal of 400771 is 177004.

It is not a de Polignac number, because 400771 - 2⁵ = 400739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4041 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (77710).

2⁴⁰⁰⁷⁷¹ is an apocalyptic number.

400771 is the 366-th hex number.

400771 is a deficient number, since it is larger than the sum of its proper divisors (65489).

400771 is an equidigital number, since it uses as much as digits as its factorization.

400771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8193 (or 8186 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 400771 is about 633.0647676186. The cubic root of 400771 is about 73.7279393943.

Adding to 400771 its reverse (177004), we get a palindrome (577775).

The spelling of 400771 in words is "four hundred thousand, seven hundred seventy-one", and thus it is an iban number.