1226645320 has 32 divisors (see below), whose sum is σ = 2905214400. Its totient is φ = 464833728.

The previous prime is 1226645309. The next prime is 1226645327. The reversal of 1226645320 is 235466221.

It is not an unprimeable number, because it can be changed into a prime (1226645327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806244 + ... + 807763.

It is an arithmetic number, because the mean of its divisors is an integer number (90787950).

Almost surely, 2^1226645320 is an apocalyptic number.

1226645320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226645320 is an abundant number, since it is smaller than the sum of its proper divisors (1678569080).

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

1226645320 is a wasteful number, since it uses less digits than its factorization.

1226645320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614037 (or 1614033 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1226645320 is about 35023.4966843689. The cubic root of 1226645320 is about 1070.4663062018.

The spelling of 1226645320 in words is "one billion, two hundred twenty-six million, six hundred forty-five thousand, three hundred twenty".