1227720560 has 40 divisors (see below), whose sum is σ = 3113948016. Its totient is φ = 446443520.

The previous prime is 1227720547. The next prime is 1227720577. The reversal of 1227720560 is 650277221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696689 + ... + 698448.

Almost surely, 2^1227720560 is an apocalyptic number.

1227720560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227720560 is an abundant number, since it is smaller than the sum of its proper divisors (1886227456).

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

1227720560 is a wasteful number, since it uses less digits than its factorization.

1227720560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395161 (or 1395155 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1227720560 is about 35038.8435882236. The cubic root of 1227720560 is about 1070.7789942634.

Adding to 1227720560 its reverse (650277221), we get a palindrome (1877997781).

The spelling of 1227720560 in words is "one billion, two hundred twenty-seven million, seven hundred twenty thousand, five hundred sixty".