31380080 has 20 divisors (see below), whose sum is σ = 72958872. Its totient is φ = 12552000.

The previous prime is 31380031. The next prime is 31380101. The reversal of 31380080 is 8008313.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196046 + ... + 196205.

Almost surely, 2^31380080 is an apocalyptic number.

It is an amenable number.

31380080 is an abundant number, since it is smaller than the sum of its proper divisors (41578792).

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

31380080 is a wasteful number, since it uses less digits than its factorization.

31380080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392264 (or 392258 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 31380080 is about 5601.7925702404. The cubic root of 31380080 is about 315.4166988823.

Adding to 31380080 its reverse (8008313), we get a palindrome (39388393).

The spelling of 31380080 in words is "thirty-one million, three hundred eighty thousand, eighty".