400442329 has 4 divisors (see below), whose sum is σ = 457648384. Its totient is φ = 343236276.

The previous prime is 400442323. The next prime is 400442431. The reversal of 400442329 is 923244004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400442329 - 2³ = 400442321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400442297 and 400442306.

It is not an unprimeable number, because it can be changed into a prime (400442321) 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, 28603017 + ... + 28603030.

It is an arithmetic number, because the mean of its divisors is an integer number (114412096).

Almost surely, 2^400442329 is an apocalyptic number.

It is an amenable number.

400442329 is a deficient number, since it is larger than the sum of its proper divisors (57206055).

400442329 is an equidigital number, since it uses as much as digits as its factorization.

400442329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57206054.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 400442329 is about 20011.0551695806. The cubic root of 400442329 is about 737.0777920067.

The spelling of 400442329 in words is "four hundred million, four hundred forty-two thousand, three hundred twenty-nine".