400343356 has 24 divisors (see below), whose sum is σ = 801545696. Its totient is φ = 171391680.

The previous prime is 400343351. The next prime is 400343381. The reversal of 400343356 is 653343004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400343351) 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, 20746 + ... + 35086.

Almost surely, 2^400343356 is an apocalyptic number.

It is an amenable number.

400343356 is an abundant number, since it is smaller than the sum of its proper divisors (401202340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400343356 is a wasteful number, since it uses less digits than its factorization.

400343356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15349 (or 15347 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 400343356 is about 20008.5820587067. The cubic root of 400343356 is about 737.0170618208.

The spelling of 400343356 in words is "four hundred million, three hundred forty-three thousand, three hundred fifty-six".