31307094 has 128 divisors (see below), whose sum is σ = 89671680. Its totient is φ = 7869312.

The previous prime is 31307077. The next prime is 31307099. The reversal of 31307094 is 49070313.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31307099) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112884 + ... + 113160.

It is an arithmetic number, because the mean of its divisors is an integer number (700560).

Almost surely, 2^31307094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31307094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44835840).

31307094 is an abundant number, since it is smaller than the sum of its proper divisors (58364586).

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

31307094 is a wasteful number, since it uses less digits than its factorization.

31307094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 325 counting only the distinct ones).

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

The square root of 31307094 is about 5595.2742560128. The cubic root of 31307094 is about 315.1719695907.

The spelling of 31307094 in words is "thirty-one million, three hundred seven thousand, ninety-four".