31401244 has 48 divisors (see below), whose sum is σ = 68160960. Its totient is φ = 12349440.

The previous prime is 31401239. The next prime is 31401257. The reversal of 31401244 is 44210413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18712 + ... + 20320.

It is an arithmetic number, because the mean of its divisors is an integer number (1420020).

Almost surely, 2^31401244 is an apocalyptic number.

31401244 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31401244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34080480).

31401244 is an abundant number, since it is smaller than the sum of its proper divisors (36759716).

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

31401244 is a wasteful number, since it uses less digits than its factorization.

31401244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678 (or 1676 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 31401244 is about 5603.6812900093. The cubic root of 31401244 is about 315.4875928893.

Adding to 31401244 its reverse (44210413), we get a palindrome (75611657).

The spelling of 31401244 in words is "thirty-one million, four hundred one thousand, two hundred forty-four".