400477 has 12 divisors (see below), whose sum is σ = 508896. Its totient is φ = 311640.

The previous prime is 400471. The next prime is 400481. The reversal of 400477 is 774004.

It is a happy number.

400477 is nontrivially palindromic in base 15.

It is a de Polignac number, because none of the positive numbers 2^k-400477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168 + ... + 910.

It is an arithmetic number, because the mean of its divisors is an integer number (42408).

2⁴⁰⁰⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

400477 is a deficient number, since it is larger than the sum of its proper divisors (108419).

400477 is a wasteful number, since it uses less digits than its factorization.

400477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 400477 is about 632.8325212882. The cubic root of 400477 is about 73.7099063889.

The spelling of 400477 in words is "four hundred thousand, four hundred seventy-seven", and thus it is an iban number.