1227877788 has 12 divisors (see below), whose sum is σ = 2865048200. Its totient is φ = 409292592.

The previous prime is 1227877769. The next prime is 1227877789. The reversal of 1227877788 is 8877787221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227877789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51161563 + ... + 51161586.

Almost surely, 2^1227877788 is an apocalyptic number.

It is an amenable number.

1227877788 is an abundant number, since it is smaller than the sum of its proper divisors (1637170412).

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

1227877788 is a wasteful number, since it uses less digits than its factorization.

1227877788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102323156 (or 102323154 counting only the distinct ones).

The product of its digits is 4917248, while the sum is 57.

The square root of 1227877788 is about 35041.0871406696. The cubic root of 1227877788 is about 1070.8247020731.

The spelling of 1227877788 in words is "one billion, two hundred twenty-seven million, eight hundred seventy-seven thousand, seven hundred eighty-eight".