424527640 has 128 divisors (see below), whose sum is σ = 1068134400. Its totient is φ = 151165440.

The previous prime is 424527637. The next prime is 424527643. The reversal of 424527640 is 46725424.

It is an interprime number because it is at equal distance from previous prime (424527637) and next prime (424527643).

It is a junction number, because it is equal to n+sod(n) for n = 424527596 and 424527605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424527643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 871477 + ... + 871963.

It is an arithmetic number, because the mean of its divisors is an integer number (8344800).

Almost surely, 2^424527640 is an apocalyptic number.

424527640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424527640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534067200).

424527640 is an abundant number, since it is smaller than the sum of its proper divisors (643606760).

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

424527640 is a wasteful number, since it uses less digits than its factorization.

424527640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 424527640 is about 20604.0685302685. The cubic root of 424527640 is about 751.5686516368.

The spelling of 424527640 in words is "four hundred twenty-four million, five hundred twenty-seven thousand, six hundred forty".