400012434200 has 48 divisors (see below), whose sum is σ = 930492315960. Its totient is φ = 159925248000.

The previous prime is 400012434139. The next prime is 400012434203. The reversal of 400012434200 is 2434210004.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400012434203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95081 + ... + 899480.

Almost surely, 2^400012434200 is an apocalyptic number.

400012434200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400012434200 is an abundant number, since it is smaller than the sum of its proper divisors (530479881760).

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

400012434200 is a wasteful number, since it uses less digits than its factorization.

400012434200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996588 (or 996579 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 400012434200 its reverse (2434210004), we get a palindrome (402446644204).

The spelling of 400012434200 in words is "four hundred billion, twelve million, four hundred thirty-four thousand, two hundred".