31276890 has 96 divisors (see below), whose sum is σ = 84913920. Its totient is φ = 7982208.

The previous prime is 31276879. The next prime is 31276909. The reversal of 31276890 is 9867213.

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 47 ways as a sum of consecutive naturals, for example, 376789 + ... + 376871.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^31276890 is an apocalyptic number.

31276890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31276890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42456960).

31276890 is an abundant number, since it is smaller than the sum of its proper divisors (53637030).

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

31276890 is a wasteful number, since it uses less digits than its factorization.

31276890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 31276890 is about 5592.5745413003. The cubic root of 31276890 is about 315.0705813116.

The spelling of 31276890 in words is "thirty-one million, two hundred seventy-six thousand, eight hundred ninety".