871977438 has 12 divisors (see below), whose sum is σ = 1889284488. Its totient is φ = 290659140.

The previous prime is 871977433. The next prime is 871977439. The reversal of 871977438 is 834779178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871977433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24221578 + ... + 24221613.

It is an arithmetic number, because the mean of its divisors is an integer number (157440374).

Almost surely, 2^871977438 is an apocalyptic number.

871977438 is an abundant number, since it is smaller than the sum of its proper divisors (1017307050).

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

871977438 is a wasteful number, since it uses less digits than its factorization.

871977438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48443199 (or 48443196 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 871977438 is about 29529.2640951311. The cubic root of 871977438 is about 955.3629964242.

The spelling of 871977438 in words is "eight hundred seventy-one million, nine hundred seventy-seven thousand, four hundred thirty-eight".