626320140 has 48 divisors (see below), whose sum is σ = 1764225792. Its totient is φ = 166015936.

The previous prime is 626320139. The next prime is 626320147. The reversal of 626320140 is 41023626.

626320140 = 1853² + 1854² + ... + 2019².

It is a self number, because there is not a number n which added to its sum of digits gives 626320140.

It is not an unprimeable number, because it can be changed into a prime (626320147) 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, 21234 + ... + 41273.

It is an arithmetic number, because the mean of its divisors is an integer number (36754704).

Almost surely, 2^626320140 is an apocalyptic number.

626320140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

626320140 is an abundant number, since it is smaller than the sum of its proper divisors (1137905652).

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

626320140 is a wasteful number, since it uses less digits than its factorization.

626320140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62686 (or 62684 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 626320140 is about 25026.3888725481. The cubic root of 626320140 is about 855.5895253717.

Adding to 626320140 its reverse (41023626), we get a palindrome (667343766).

The spelling of 626320140 in words is "six hundred twenty-six million, three hundred twenty thousand, one hundred forty".