1227135840 has 192 divisors, whose sum is σ = 4479100416. Its totient is φ = 276590592.

The previous prime is 1227135799. The next prime is 1227135857. The reversal of 1227135840 is 485317221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242779 + ... + 247781.

It is an arithmetic number, because the mean of its divisors is an integer number (23328648).

Almost surely, 2^1227135840 is an apocalyptic number.

1227135840 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 1227135840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2239550208).

1227135840 is an abundant number, since it is smaller than the sum of its proper divisors (3251964576).

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

1227135840 is a wasteful number, since it uses less digits than its factorization.

1227135840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101 (or 5093 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 1227135840 is about 35030.4987118368. The cubic root of 1227135840 is about 1070.6089758467.

The spelling of 1227135840 in words is "one billion, two hundred twenty-seven million, one hundred thirty-five thousand, eight hundred forty".