424221040 has 20 divisors (see below), whose sum is σ = 986314104. Its totient is φ = 169688384.

The previous prime is 424221011. The next prime is 424221041. The reversal of 424221040 is 40122424.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 424220999 and 424221017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424221041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2651302 + ... + 2651461.

Almost surely, 2^424221040 is an apocalyptic number.

424221040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

424221040 is an abundant number, since it is smaller than the sum of its proper divisors (562093064).

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

424221040 is a wasteful number, since it uses less digits than its factorization.

424221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302776 (or 5302770 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 424221040 is about 20596.6269083071. The cubic root of 424221040 is about 751.3876768132.

Adding to 424221040 its reverse (40122424), we get a palindrome (464343464).

The spelling of 424221040 in words is "four hundred twenty-four million, two hundred twenty-one thousand, forty".