3931878870 has 96 divisors (see below), whose sum is σ = 10593011520. Its totient is φ = 1010661120.

The previous prime is 3931878833. The next prime is 3931878871. The reversal of 3931878870 is 788781393.

3931878870 is a `hidden beast` number, since 393 + 187 + 8 + 8 + 70 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3931878871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2601415 + ... + 2602925.

It is an arithmetic number, because the mean of its divisors is an integer number (110343870).

Almost surely, 2^3931878870 is an apocalyptic number.

3931878870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3931878870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5296505760).

3931878870 is an abundant number, since it is smaller than the sum of its proper divisors (6661132650).

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

3931878870 is a wasteful number, since it uses less digits than its factorization.

3931878870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550 (or 2547 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 3931878870 is about 62704.6957571760. The cubic root of 3931878870 is about 1578.3381113213.

The spelling of 3931878870 in words is "three billion, nine hundred thirty-one million, eight hundred seventy-eight thousand, eight hundred seventy".