31240190 has 8 divisors (see below), whose sum is σ = 56232360. Its totient is φ = 12496072.

The previous prime is 31240171. The next prime is 31240207. The reversal of 31240190 is 9104213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31240190² = 1951898942472200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562000 + ... + 1562019.

It is an arithmetic number, because the mean of its divisors is an integer number (7029045).

Almost surely, 2^31240190 is an apocalyptic number.

31240190 is a deficient number, since it is larger than the sum of its proper divisors (24992170).

31240190 is a wasteful number, since it uses less digits than its factorization.

31240190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124026.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 31240190 is about 5589.2924418033. The cubic root of 31240190 is about 314.9472994896.

The spelling of 31240190 in words is "thirty-one million, two hundred forty thousand, one hundred ninety".