400573971 has 48 divisors (see below), whose sum is σ = 712673280. Its totient is φ = 221492880.

The previous prime is 400573969. The next prime is 400573973. The reversal of 400573971 is 179375004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (400573969) and next prime (400573973).

It is not a de Polignac number, because 400573971 - 2¹ = 400573969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400573973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36130 + ... + 45896.

It is an arithmetic number, because the mean of its divisors is an integer number (14847360).

Almost surely, 2^400573971 is an apocalyptic number.

400573971 is a deficient number, since it is larger than the sum of its proper divisors (312099309).

400573971 is a wasteful number, since it uses less digits than its factorization.

400573971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821 (or 9808 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 400573971 is about 20014.3441311475. The cubic root of 400573971 is about 737.1585525033.

The spelling of 400573971 in words is "four hundred million, five hundred seventy-three thousand, nine hundred seventy-one".