31347090 has 48 divisors (see below), whose sum is σ = 81806400. Its totient is φ = 8328096.

The previous prime is 31347079. The next prime is 31347097. The reversal of 31347090 is 9074313.

It is not an unprimeable number, because it can be changed into a prime (31347097) by changing a digit.

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, 33651 + ... + 34569.

It is an arithmetic number, because the mean of its divisors is an integer number (1704300).

Almost surely, 2^31347090 is an apocalyptic number.

31347090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31347090 is an abundant number, since it is smaller than the sum of its proper divisors (50459310).

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

31347090 is a wasteful number, since it uses less digits than its factorization.

31347090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 31347090 is about 5598.8472027731. The cubic root of 31347090 is about 315.3061271915.

The spelling of 31347090 in words is "thirty-one million, three hundred forty-seven thousand, ninety".