400043430 has 48 divisors (see below), whose sum is σ = 1051820640. Its totient is φ = 105477504.

The previous prime is 400043401. The next prime is 400043443. The reversal of 400043430 is 34340004.

It is a super-4 number, since 4×400043430⁴ (a number of 36 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16962 + ... + 32981.

It is an arithmetic number, because the mean of its divisors is an integer number (21912930).

Almost surely, 2^400043430 is an apocalyptic number.

400043430 is an abundant number, since it is smaller than the sum of its proper divisors (651777210).

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

400043430 is a wasteful number, since it uses less digits than its factorization.

400043430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50045 (or 50042 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400043430 is about 20001.0857205303. The cubic root of 400043430 is about 736.8329650110.

Adding to 400043430 its reverse (34340004), we get a palindrome (434383434).

It can be divided in two parts, 40004 and 3430, that added together give a palindrome (43434).

The spelling of 400043430 in words is "four hundred million, forty-three thousand, four hundred thirty".