1377772228 has 12 divisors (see below), whose sum is σ = 2755544512. Its totient is φ = 590473800.

The previous prime is 1377772217. The next prime is 1377772229. The reversal of 1377772228 is 8222777731.

1377772228 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1377772229) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 24603048 + ... + 24603103.

Almost surely, 2^1377772228 is an apocalyptic number.

It is an amenable number.

1377772228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1377772228 is a wasteful number, since it uses less digits than its factorization.

1377772228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49206162 (or 49206160 counting only the distinct ones).

The product of its digits is 460992, while the sum is 46.

The square root of 1377772228 is about 37118.3543277447. The cubic root of 1377772228 is about 1112.7368623801.

The spelling of 1377772228 in words is "one billion, three hundred seventy-seven million, seven hundred seventy-two thousand, two hundred twenty-eight".