31394004 has 36 divisors (see below), whose sum is σ = 77321664. Its totient is φ = 9912528.

The previous prime is 31393981. The next prime is 31394017. The reversal of 31394004 is 40049313.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 709 + ... + 7955.

It is an arithmetic number, because the mean of its divisors is an integer number (2147824).

Almost surely, 2^31394004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31394004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38660832).

31394004 is an abundant number, since it is smaller than the sum of its proper divisors (45927660).

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

31394004 is a wasteful number, since it uses less digits than its factorization.

31394004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7292 (or 7271 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31394004 is about 5603.0352488629. The cubic root of 31394004 is about 315.4633443198.

The spelling of 31394004 in words is "thirty-one million, three hundred ninety-four thousand, four".