1227267720 has 256 divisors, whose sum is σ = 4772160000. Its totient is φ = 280433664.

The previous prime is 1227267659. The next prime is 1227267749. The reversal of 1227267720 is 277627221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 368784 + ... + 372096.

It is an arithmetic number, because the mean of its divisors is an integer number (18641250).

Almost surely, 2^1227267720 is an apocalyptic number.

1227267720 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 1227267720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2386080000).

1227267720 is an abundant number, since it is smaller than the sum of its proper divisors (3544892280).

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

1227267720 is a wasteful number, since it uses less digits than its factorization.

1227267720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 1227267720 is about 35032.3810209926. The cubic root of 1227267720 is about 1070.6473271711.

The spelling of 1227267720 in words is "one billion, two hundred twenty-seven million, two hundred sixty-seven thousand, seven hundred twenty".