400451043 has 4 divisors (see below), whose sum is σ = 533934728. Its totient is φ = 266967360.

The previous prime is 400451041. The next prime is 400451047. The reversal of 400451043 is 340154004.

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

It is not a de Polignac number, because 400451043 - 2¹ = 400451041 is a prime.

It is a super-2 number, since 2×400451043² = 320722075679575698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400451041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66741838 + ... + 66741843.

It is an arithmetic number, because the mean of its divisors is an integer number (133483682).

Almost surely, 2^400451043 is an apocalyptic number.

400451043 is a deficient number, since it is larger than the sum of its proper divisors (133483685).

400451043 is a wasteful number, since it uses less digits than its factorization.

400451043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133483684.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 400451043 is about 20011.2728980442. The cubic root of 400451043 is about 737.0831384689.

The spelling of 400451043 in words is "four hundred million, four hundred fifty-one thousand, forty-three".