400055307 has 8 divisors (see below), whose sum is σ = 556598784. Its totient is φ = 255107688.

The previous prime is 400055303. The next prime is 400055321. The reversal of 400055307 is 703550004.

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

It is not a de Polignac number, because 400055307 - 2² = 400055303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400055303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2898883 + ... + 2899020.

It is an arithmetic number, because the mean of its divisors is an integer number (69574848).

Almost surely, 2^400055307 is an apocalyptic number.

400055307 is a deficient number, since it is larger than the sum of its proper divisors (156543477).

400055307 is a wasteful number, since it uses less digits than its factorization.

400055307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5797929.

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 400055307 is about 20001.3826272086. The cubic root of 400055307 is about 736.8402569514.

The spelling of 400055307 in words is "four hundred million, fifty-five thousand, three hundred seven".