31144080 has 160 divisors (see below), whose sum is σ = 107993088. Its totient is φ = 7360000.

The previous prime is 31144049. The next prime is 31144103. The reversal of 31144080 is 8044113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123955 + ... + 124205.

Almost surely, 2^31144080 is an apocalyptic number.

31144080 is a gapful number since it is divisible by the number (30) 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 31144080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53996544).

31144080 is an abundant number, since it is smaller than the sum of its proper divisors (76849008).

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

31144080 is a wasteful number, since it uses less digits than its factorization.

31144080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 31144080 is about 5580.6881296127. The cubic root of 31144080 is about 314.6239907492.

Adding to 31144080 its reverse (8044113), we get a palindrome (39188193).

The spelling of 31144080 in words is "thirty-one million, one hundred forty-four thousand, eighty".