626928540 has 192 divisors, whose sum is σ = 2099865600. Its totient is φ = 139614720.

The previous prime is 626928517. The next prime is 626928551. The reversal of 626928540 is 45829626.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 626928492 and 626928501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 843409 + ... + 844151.

It is an arithmetic number, because the mean of its divisors is an integer number (10936800).

Almost surely, 2^626928540 is an apocalyptic number.

626928540 is a gapful number since it is divisible by the number (60) 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 626928540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049932800).

626928540 is an abundant number, since it is smaller than the sum of its proper divisors (1472937060).

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

626928540 is a wasteful number, since it uses less digits than its factorization.

626928540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 626928540 is about 25038.5410916850. The cubic root of 626928540 is about 855.8664722428.

The spelling of 626928540 in words is "six hundred twenty-six million, nine hundred twenty-eight thousand, five hundred forty".