31280094 has 40 divisors (see below), whose sum is σ = 70436520. Its totient is φ = 10375344.

The previous prime is 31280087. The next prime is 31280101. The reversal of 31280094 is 49008213.

It is an interprime number because it is at equal distance from previous prime (31280087) and next prime (31280101).

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 19 ways as a sum of consecutive naturals, for example, 47137 + ... + 47795.

It is an arithmetic number, because the mean of its divisors is an integer number (1760913).

Almost surely, 2^31280094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31280094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35218260).

31280094 is an abundant number, since it is smaller than the sum of its proper divisors (39156426).

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

31280094 is a wasteful number, since it uses less digits than its factorization.

31280094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 31280094 is about 5592.8609852204. The cubic root of 31280094 is about 315.0813395389.

The spelling of 31280094 in words is "thirty-one million, two hundred eighty thousand, ninety-four".