400124343 has 4 divisors (see below), whose sum is σ = 533499128. Its totient is φ = 266749560.

The previous prime is 400124341. The next prime is 400124357. The reversal of 400124343 is 343421004.

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

It is not a de Polignac number, because 400124343 - 2¹ = 400124341 is a prime.

It is a super-2 number, since 2×400124343² = 320198979722363298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400124341) 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, 66687388 + ... + 66687393.

It is an arithmetic number, because the mean of its divisors is an integer number (133374782).

Almost surely, 2^400124343 is an apocalyptic number.

400124343 is a deficient number, since it is larger than the sum of its proper divisors (133374785).

400124343 is a wasteful number, since it uses less digits than its factorization.

400124343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133374784.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 400124343 is about 20003.1083334566. The cubic root of 400124343 is about 736.8826390732.

Adding to 400124343 its reverse (343421004), we get a palindrome (743545347).

The spelling of 400124343 in words is "four hundred million, one hundred twenty-four thousand, three hundred forty-three".