400444406 has 8 divisors (see below), whose sum is σ = 600751920. Its totient is φ = 200193768.

The previous prime is 400444403. The next prime is 400444409. The reversal of 400444406 is 604444004.

It is an interprime number because it is at equal distance from previous prime (400444403) and next prime (400444409).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444403) 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, 17855 + ... + 33461.

It is an arithmetic number, because the mean of its divisors is an integer number (75093990).

Almost surely, 2^400444406 is an apocalyptic number.

400444406 is a deficient number, since it is larger than the sum of its proper divisors (200307514).

400444406 is a wasteful number, since it uses less digits than its factorization.

400444406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28438.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 400444406 is about 20011.1070658272. The cubic root of 400444406 is about 737.0790663541.

The spelling of 400444406 in words is "four hundred million, four hundred forty-four thousand, four hundred six".