425415240 has 144 divisors (see below), whose sum is σ = 1436589180. Its totient is φ = 113374080.

The previous prime is 425415229. The next prime is 425415241. The reversal of 425415240 is 42514524.

425415240 is a `hidden beast` number, since 4 + 2 + 5 + 415 + 240 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 423289476 + 2125764 = 20574^2 + 1458^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (425415241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 261630 + ... + 263250.

Almost surely, 2^425415240 is an apocalyptic number.

425415240 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 425415240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718294590).

425415240 is an abundant number, since it is smaller than the sum of its proper divisors (1011173940).

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

425415240 is an equidigital number, since it uses as much as digits as its factorization.

425415240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 425415240 is about 20625.5967186407. The cubic root of 425415240 is about 752.0920788487.

Adding to 425415240 its reverse (42514524), we get a palindrome (467929764).

The spelling of 425415240 in words is "four hundred twenty-five million, four hundred fifteen thousand, two hundred forty".