626616540 has 96 divisors (see below), whose sum is σ = 2126718720. Its totient is φ = 151905600.

The previous prime is 626616479. The next prime is 626616559. The reversal of 626616540 is 45616626.

It is a happy number.

626616540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 626616495 and 626616504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46806 + ... + 58685.

It is an arithmetic number, because the mean of its divisors is an integer number (22153320).

Almost surely, 2^626616540 is an apocalyptic number.

626616540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

626616540 is an abundant number, since it is smaller than the sum of its proper divisors (1500102180).

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

626616540 is a wasteful number, since it uses less digits than its factorization.

626616540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105520 (or 105512 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 626616540 is about 25032.3099213796. The cubic root of 626616540 is about 855.7244705994.

The spelling of 626616540 in words is "six hundred twenty-six million, six hundred sixteen thousand, five hundred forty".