400420224424 has 32 divisors (see below), whose sum is σ = 820408824000. Its totient is φ = 181705313920.

The previous prime is 400420224409. The next prime is 400420224439. The reversal of 400420224424 is 424422024004.

It is an interprime number because it is at equal distance from previous prime (400420224409) and next prime (400420224439).

It is a super-2 number, since 2×400420224424² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400420224392 and 400420224401.

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, 3745477 + ... + 3850900.

It is an arithmetic number, because the mean of its divisors is an integer number (25637775750).

Almost surely, 2^400420224424 is an apocalyptic number.

400420224424 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400420224424 is an abundant number, since it is smaller than the sum of its proper divisors (419988599576).

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

400420224424 is a wasteful number, since it uses less digits than its factorization.

400420224424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7596993 (or 7596989 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400420224424 its reverse (424422024004), we get a palindrome (824842248428).

The spelling of 400420224424 in words is "four hundred billion, four hundred twenty million, two hundred twenty-four thousand, four hundred twenty-four".