400000624420 has 48 divisors (see below), whose sum is σ = 872603020800. Its totient is φ = 153836574080.

The previous prime is 400000624399. The next prime is 400000624423. The reversal of 400000624420 is 24426000004.

It is a junction number, because it is equal to n+sod(n) for n = 400000624391 and 400000624400.

It is not an unprimeable number, because it can be changed into a prime (400000624423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1304176 + ... + 1581415.

It is an arithmetic number, because the mean of its divisors is an integer number (18179229600).

Almost surely, 2^400000624420 is an apocalyptic number.

It is an amenable number.

400000624420 is an abundant number, since it is smaller than the sum of its proper divisors (472602396380).

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

400000624420 is a wasteful number, since it uses less digits than its factorization.

400000624420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885868 (or 2885866 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 400000624420 its reverse (24426000004), we get a palindrome (424426624424).

The spelling of 400000624420 in words is "four hundred billion, six hundred twenty-four thousand, four hundred twenty".