1020626620 has 120 divisors (see below), whose sum is σ = 2504625984. Its totient is φ = 347132928.

The previous prime is 1020626617. The next prime is 1020626627. The reversal of 1020626620 is 266260201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020626627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21715437 + ... + 21715483.

Almost surely, 2^1020626620 is an apocalyptic number.

1020626620 is a gapful number since it is divisible by the number (10) 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 1020626620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252312992).

1020626620 is an abundant number, since it is smaller than the sum of its proper divisors (1483999364).

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

1020626620 is an equidigital number, since it uses as much as digits as its factorization.

1020626620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1020626620 is about 31947.2474557668. The cubic root of 1020626620 is about 1006.8288013244.

Adding to 1020626620 its reverse (266260201), we get a palindrome (1286886821).

The spelling of 1020626620 in words is "one billion, twenty million, six hundred twenty-six thousand, six hundred twenty".