400276343 has 8 divisors (see below), whose sum is σ = 405630000. Its totient is φ = 394941888.

The previous prime is 400276319. The next prime is 400276369. The reversal of 400276343 is 343672004.

It is a happy number.

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 400276343 - 2¹⁶ = 400210807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400276313) 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, 39905 + ... + 48917.

It is an arithmetic number, because the mean of its divisors is an integer number (50703750).

Almost surely, 2^400276343 is an apocalyptic number.

400276343 is a deficient number, since it is larger than the sum of its proper divisors (5353657).

400276343 is an equidigital number, since it uses as much as digits as its factorization.

400276343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9601.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 400276343 is about 20006.9073822018. The cubic root of 400276343 is about 736.9759367218.

The spelling of 400276343 in words is "four hundred million, two hundred seventy-six thousand, three hundred forty-three".