400027 has 4 divisors (see below), whose sum is σ = 423576. Its totient is φ = 376480.

The previous prime is 400009. The next prime is 400031. The reversal of 400027 is 720004.

400027 is nontrivially palindromic in base 15.

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 400027 - 2⁷ = 399899 is a prime.

It is a Duffinian number.

400027 is an undulating number in base 15.

It is not an unprimeable number, because it can be changed into a prime (400067) 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, 11749 + ... + 11782.

It is an arithmetic number, because the mean of its divisors is an integer number (105894).

2⁴⁰⁰⁰²⁷ is an apocalyptic number.

400027 is a deficient number, since it is larger than the sum of its proper divisors (23549).

400027 is a wasteful number, since it uses less digits than its factorization.

400027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23548.

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 400027 is about 632.4768770477. The cubic root of 400027 is about 73.6822877497.

The spelling of 400027 in words is "four hundred thousand, twenty-seven", and thus it is an iban number.