1226620560 has 120 divisors (see below), whose sum is σ = 4179732480. Its totient is φ = 297355520.

The previous prime is 1226620553. The next prime is 1226620579. The reversal of 1226620560 is 650266221.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7921 + ... + 50159.

It is an arithmetic number, because the mean of its divisors is an integer number (34831104).

Almost surely, 2^1226620560 is an apocalyptic number.

1226620560 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 1226620560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2089866240).

1226620560 is an abundant number, since it is smaller than the sum of its proper divisors (2953111920).

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

1226620560 is a wasteful number, since it uses less digits than its factorization.

1226620560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42277 (or 42260 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1226620560 is about 35023.1432056005. The cubic root of 1226620560 is about 1070.4591036515.

Adding to 1226620560 its reverse (650266221), we get a palindrome (1876886781).

The spelling of 1226620560 in words is "one billion, two hundred twenty-six million, six hundred twenty thousand, five hundred sixty".