1220650620 has 96 divisors (see below), whose sum is σ = 3914254848. Its totient is φ = 278422272.

The previous prime is 1220650597. The next prime is 1220650621. The reversal of 1220650620 is 260560221.

It is a super-2 number, since 2×1220650620² = 2979975872212768800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220650621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216882 + ... + 222438.

It is an arithmetic number, because the mean of its divisors is an integer number (40773488).

Almost surely, 2^1220650620 is an apocalyptic number.

1220650620 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 1220650620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957127424).

1220650620 is an abundant number, since it is smaller than the sum of its proper divisors (2693604228).

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

1220650620 is a wasteful number, since it uses less digits than its factorization.

1220650620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099 (or 6097 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1220650620 is about 34937.8107499597. The cubic root of 1220650620 is about 1068.7196436096.

It can be divided in two parts, 12206 and 50620, that added together give a palindrome (62826).

The spelling of 1220650620 in words is "one billion, two hundred twenty million, six hundred fifty thousand, six hundred twenty".