400554071 has 4 divisors (see below), whose sum is σ = 400632144. Its totient is φ = 400476000.

The previous prime is 400554059. The next prime is 400554079. The reversal of 400554071 is 170455004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400554071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400554071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400554079) 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, 30755 + ... + 41796.

It is an arithmetic number, because the mean of its divisors is an integer number (100158036).

Almost surely, 2^400554071 is an apocalyptic number.

400554071 is a deficient number, since it is larger than the sum of its proper divisors (78073).

400554071 is an equidigital number, since it uses as much as digits as its factorization.

400554071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78072.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 400554071 is about 20013.8469815276. The cubic root of 400554071 is about 737.1463452713.

The spelling of 400554071 in words is "four hundred million, five hundred fifty-four thousand, seventy-one".