627781868 has 48 divisors (see below), whose sum is σ = 1306195968. Its totient is φ = 258336000.

The previous prime is 627781829. The next prime is 627781883. The reversal of 627781868 is 868187726.

It is a happy number.

627781868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×627781868² = 788220147579138848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110948 + ... + 116468.

It is an arithmetic number, because the mean of its divisors is an integer number (27212416).

Almost surely, 2^627781868 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 627781868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653097984).

627781868 is an abundant number, since it is smaller than the sum of its proper divisors (678414100).

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

627781868 is a wasteful number, since it uses less digits than its factorization.

627781868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694 (or 5692 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 53.

The square root of 627781868 is about 25055.5755870824. The cubic root of 627781868 is about 856.2546098958.

It can be divided in two parts, 62778 and 1868, that added together give a palindrome (64646).

The spelling of 627781868 in words is "six hundred twenty-seven million, seven hundred eighty-one thousand, eight hundred sixty-eight".