31194396 has 72 divisors (see below), whose sum is σ = 83166720. Its totient is φ = 10221552.

The previous prime is 31194391. The next prime is 31194407. The reversal of 31194396 is 69349113.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31194396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31194391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64885 + ... + 65363.

Almost surely, 2^31194396 is an apocalyptic number.

31194396 is a gapful number since it is divisible by the number (36) 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 31194396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41583360).

31194396 is an abundant number, since it is smaller than the sum of its proper divisors (51972324).

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

31194396 is a wasteful number, since it uses less digits than its factorization.

31194396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 551 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 31194396 is about 5585.1943565108. The cubic root of 31194396 is about 314.7933338272.

The spelling of 31194396 in words is "thirty-one million, one hundred ninety-four thousand, three hundred ninety-six".