425213440 has 40 divisors (see below), whose sum is σ = 1019521800. Its totient is φ = 170084352.

The previous prime is 425213429. The next prime is 425213441. The reversal of 425213440 is 44312524.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425213441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80490 + ... + 85609.

It is an arithmetic number, because the mean of its divisors is an integer number (25488045).

Almost surely, 2^425213440 is an apocalyptic number.

425213440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

425213440 is an abundant number, since it is smaller than the sum of its proper divisors (594308360).

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

425213440 is an equidigital number, since it uses as much as digits as its factorization.

425213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166122 (or 166106 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 425213440 is about 20620.7041586848. The cubic root of 425213440 is about 751.9731392247.

Adding to 425213440 its reverse (44312524), we get a palindrome (469525964).

The spelling of 425213440 in words is "four hundred twenty-five million, two hundred thirteen thousand, four hundred forty".