31401304 has 32 divisors (see below), whose sum is σ = 64884240. Its totient is φ = 14128000.

The previous prime is 31401289. The next prime is 31401313. The reversal of 31401304 is 40310413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7122 + ... + 10654.

Almost surely, 2^31401304 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 31401304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32442120).

31401304 is an abundant number, since it is smaller than the sum of its proper divisors (33482936).

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

31401304 is a wasteful number, since it uses less digits than its factorization.

31401304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651 (or 3647 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31401304 is about 5603.6866436302. The cubic root of 31401304 is about 315.4877938287.

Adding to 31401304 its reverse (40310413), we get a palindrome (71711717).

It can be divided in two parts, 3140 and 1304, that added together give a palindrome (4444).

The spelling of 31401304 in words is "thirty-one million, four hundred one thousand, three hundred four".