1227884840 has 128 divisors (see below), whose sum is σ = 3600495360. Its totient is φ = 365727744.

The previous prime is 1227884821. The next prime is 1227884927. The reversal of 1227884840 is 484887221.

It is a junction number, because it is equal to n+sod(n) for n = 1227884791 and 1227884800.

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, 51959 + ... + 71801.

It is an arithmetic number, because the mean of its divisors is an integer number (28128870).

Almost surely, 2^1227884840 is an apocalyptic number.

1227884840 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 1227884840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800247680).

1227884840 is an abundant number, since it is smaller than the sum of its proper divisors (2372610520).

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

1227884840 is a wasteful number, since it uses less digits than its factorization.

1227884840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19891 (or 19887 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 44.

The square root of 1227884840 is about 35041.1877652570. The cubic root of 1227884840 is about 1070.8267520712.

The spelling of 1227884840 in words is "one billion, two hundred twenty-seven million, eight hundred eighty-four thousand, eight hundred forty".