31940190 has 32 divisors (see below), whose sum is σ = 85174560. Its totient is φ = 8517312.

The previous prime is 31940179. The next prime is 31940219. The reversal of 31940190 is 9104913.

It is a super-3 number, since 3×31940190³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 58879 + ... + 59418.

It is an arithmetic number, because the mean of its divisors is an integer number (2661705).

Almost surely, 2^31940190 is an apocalyptic number.

31940190 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31940190 is an abundant number, since it is smaller than the sum of its proper divisors (53234370).

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

31940190 is a wasteful number, since it uses less digits than its factorization.

31940190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118313 (or 118307 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 31940190 is about 5651.5652699053. The cubic root of 31940190 is about 317.2822902488.

The spelling of 31940190 in words is "thirty-one million, nine hundred forty thousand, one hundred ninety".