625712440 has 16 divisors (see below), whose sum is σ = 1407853080. Its totient is φ = 250284960.

The previous prime is 625712411. The next prime is 625712443. The reversal of 625712440 is 44217526.

625712440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625712443) 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, 7821366 + ... + 7821445.

Almost surely, 2^625712440 is an apocalyptic number.

It is an amenable number.

625712440 is an abundant number, since it is smaller than the sum of its proper divisors (782140640).

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

625712440 is a wasteful number, since it uses less digits than its factorization.

625712440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15642822 (or 15642818 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 625712440 is about 25014.2447417467. The cubic root of 625712440 is about 855.3127180472.

Adding to 625712440 its reverse (44217526), we get a palindrome (669929966).

The spelling of 625712440 in words is "six hundred twenty-five million, seven hundred twelve thousand, four hundred forty".