31196340 has 216 divisors, whose sum is σ = 115026912. Its totient is φ = 7076160.

The previous prime is 31196311. The next prime is 31196353. The reversal of 31196340 is 4369113.

31196340 is a `hidden beast` number, since 311 + 9 + 6 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 238075 + ... + 238205.

It is an arithmetic number, because the mean of its divisors is an integer number (532532).

Almost surely, 2^31196340 is an apocalyptic number.

31196340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31196340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57513456).

31196340 is an abundant number, since it is smaller than the sum of its proper divisors (83830572).

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

31196340 is a wasteful number, since it uses less digits than its factorization.

31196340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 31196340 is about 5585.3683853440. The cubic root of 31196340 is about 314.7998728813.

The spelling of 31196340 in words is "thirty-one million, one hundred ninety-six thousand, three hundred forty".