381277556 has 48 divisors (see below), whose sum is σ = 757155840. Its totient is φ = 166428000.

The previous prime is 381277553. The next prime is 381277607. The reversal of 381277556 is 655772183.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381277553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188591 + ... + 190601.

It is an arithmetic number, because the mean of its divisors is an integer number (15774080).

Almost surely, 2^381277556 is an apocalyptic number.

It is an amenable number.

381277556 is a deficient number, since it is larger than the sum of its proper divisors (375878284).

381277556 is a wasteful number, since it uses less digits than its factorization.

381277556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196 (or 2194 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The square root of 381277556 is about 19526.3298138693. The cubic root of 381277556 is about 725.1264502389.

The spelling of 381277556 in words is "three hundred eighty-one million, two hundred seventy-seven thousand, five hundred fifty-six".