387881131 has 8 divisors (see below), whose sum is σ = 441540864. Its totient is φ = 337287720.

The previous prime is 387881063. The next prime is 387881149. The reversal of 387881131 is 131188783.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387881131 - 2¹³ = 387872939 is a prime.

It is a super-2 number, since 2×387881131² = 300903543571678322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387881731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766311 + ... + 766816.

It is an arithmetic number, because the mean of its divisors is an integer number (55192608).

Almost surely, 2^387881131 is an apocalyptic number.

387881131 is a deficient number, since it is larger than the sum of its proper divisors (53659733).

387881131 is a wasteful number, since it uses less digits than its factorization.

387881131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533161.

The product of its digits is 32256, while the sum is 40.

The square root of 387881131 is about 19694.6980428744. The cubic root of 387881131 is about 729.2888119616.

The spelling of 387881131 in words is "three hundred eighty-seven million, eight hundred eighty-one thousand, one hundred thirty-one".