31214890 has 48 divisors (see below), whose sum is σ = 68257152. Its totient is φ = 10066176.

The previous prime is 31214867. The next prime is 31214903. The reversal of 31214890 is 9841213.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 19459 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (1422024).

Almost surely, 2^31214890 is an apocalyptic number.

31214890 is an abundant number, since it is smaller than the sum of its proper divisors (37042262).

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

31214890 is a wasteful number, since it uses less digits than its factorization.

31214890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 31214890 is about 5587.0287273290. The cubic root of 31214890 is about 314.8622560603.

The spelling of 31214890 in words is "thirty-one million, two hundred fourteen thousand, eight hundred ninety".