400479 has 4 divisors (see below), whose sum is σ = 533976. Its totient is φ = 266984.

The previous prime is 400471. The next prime is 400481. The reversal of 400479 is 974004.

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

It is a cyclic number.

It is not a de Polignac number, because 400479 - 2³ = 400471 is a prime.

It is a D-number.

400479 is a lucky 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66744 + ... + 66749.

It is an arithmetic number, because the mean of its divisors is an integer number (133494).

2⁴⁰⁰⁴⁷⁹ is an apocalyptic number.

400479 is a deficient number, since it is larger than the sum of its proper divisors (133497).

400479 is a wasteful number, since it uses less digits than its factorization.

400479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133496.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 400479 is about 632.8341014832. The cubic root of 400479 is about 73.7100290922.

The spelling of 400479 in words is "four hundred thousand, four hundred seventy-nine".