31134870 has 144 divisors (see below), whose sum is σ = 92495520. Its totient is φ = 7248384.

The previous prime is 31134839. The next prime is 31134889. The reversal of 31134870 is 7843113.

31134870 is a `hidden beast` number, since 311 + 348 + 7 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 349786 + ... + 349874.

It is an arithmetic number, because the mean of its divisors is an integer number (642330).

Almost surely, 2^31134870 is an apocalyptic number.

31134870 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 31134870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46247760).

31134870 is an abundant number, since it is smaller than the sum of its proper divisors (61360650).

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

31134870 is a wasteful number, since it uses less digits than its factorization.

31134870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 31134870 is about 5579.8629015416. The cubic root of 31134870 is about 314.5929739113.

Adding to 31134870 its reverse (7843113), we get a palindrome (38977983).

The spelling of 31134870 in words is "thirty-one million, one hundred thirty-four thousand, eight hundred seventy".