625273640 has 64 divisors (see below), whose sum is σ = 1470646800. Its totient is φ = 238952448.

The previous prime is 625273639. The next prime is 625273643. The reversal of 625273640 is 46372526.

It can be written as a sum of positive squares in 8 ways, for example, as 427083556 + 198190084 = 20666^2 + 14078^2 .

It is a super-3 number, since 3×625273640³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 625273640.

It is not an unprimeable number, because it can be changed into a prime (625273643) 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 15 ways as a sum of consecutive naturals, for example, 109742 + ... + 115298.

Almost surely, 2^625273640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625273640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735323400).

625273640 is an abundant number, since it is smaller than the sum of its proper divisors (845373160).

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

625273640 is a wasteful number, since it uses less digits than its factorization.

625273640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694 (or 5690 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 625273640 is about 25005.4722011003. The cubic root of 625273640 is about 855.1127332173.

The spelling of 625273640 in words is "six hundred twenty-five million, two hundred seventy-three thousand, six hundred forty".