400343430 has 16 divisors (see below), whose sum is σ = 960824304. Its totient is φ = 106758240.

The previous prime is 400343429. The next prime is 400343473. The reversal of 400343430 is 34343004.

It is a super-3 number, since 3×400343430³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400343397 and 400343406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6672361 + ... + 6672420.

It is an arithmetic number, because the mean of its divisors is an integer number (60051519).

Almost surely, 2^400343430 is an apocalyptic number.

400343430 is an abundant number, since it is smaller than the sum of its proper divisors (560480874).

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

400343430 is a wasteful number, since it uses less digits than its factorization.

400343430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13344791.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 400343430 is about 20008.5839079131. The cubic root of 400343430 is about 737.0171072312.

Adding to 400343430 its reverse (34343004), we get a palindrome (434686434).

The spelling of 400343430 in words is "four hundred million, three hundred forty-three thousand, four hundred thirty".