387876181 has 32 divisors (see below), whose sum is σ = 494097408. Its totient is φ = 295751040.

The previous prime is 387876149. The next prime is 387876187. The reversal of 387876181 is 181678783.

It is a cyclic number.

It is not a de Polignac number, because 387876181 - 2⁵ = 387876149 is a prime.

It is a super-2 number, since 2×387876181² = 300895863574289522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387876187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 875346 + ... + 875788.

It is an arithmetic number, because the mean of its divisors is an integer number (15440544).

Almost surely, 2^387876181 is an apocalyptic number.

387876181 is the 11371-st octagonal number.

It is an amenable number.

387876181 is a deficient number, since it is larger than the sum of its proper divisors (106221227).

387876181 is a wasteful number, since it uses less digits than its factorization.

387876181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its digits is 451584, while the sum is 49.

The square root of 387876181 is about 19694.5723741339. The cubic root of 387876181 is about 729.2857096409.

The spelling of 387876181 in words is "three hundred eighty-seven million, eight hundred seventy-six thousand, one hundred eighty-one".