400343493 has 8 divisors (see below), whose sum is σ = 582317856. Its totient is φ = 242632400.

The previous prime is 400343477. The next prime is 400343501. The reversal of 400343493 is 394343004.

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

It is a cyclic number.

It is not a de Polignac number, because 400343493 - 2⁴ = 400343477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400343493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400343413) 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, 6065778 + ... + 6065843.

It is an arithmetic number, because the mean of its divisors is an integer number (72789732).

Almost surely, 2^400343493 is an apocalyptic number.

It is an amenable number.

400343493 is a deficient number, since it is larger than the sum of its proper divisors (181974363).

400343493 is a wasteful number, since it uses less digits than its factorization.

400343493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12131635.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 400343493 is about 20008.5854822374. The cubic root of 400343493 is about 737.0171458914.

Adding to 400343493 its reverse (394343004), we get a palindrome (794686497).

The spelling of 400343493 in words is "four hundred million, three hundred forty-three thousand, four hundred ninety-three".