31418880 has 80 divisors (see below), whose sum is σ = 100466784. Its totient is φ = 8376320.

The previous prime is 31418867. The next prime is 31418899. The reversal of 31418880 is 8881413.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 5635 + ... + 9725.

Almost surely, 2^31418880 is an apocalyptic number.

31418880 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 31418880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50233392).

31418880 is an abundant number, since it is smaller than the sum of its proper divisors (69047904).

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

31418880 is an equidigital number, since it uses as much as digits as its factorization.

31418880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117 (or 4101 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 31418880 is about 5605.2546775325. The cubic root of 31418880 is about 315.5466446674.

It can be divided in two parts, 3141 and 8880, that added together give a palindrome (12021).

The spelling of 31418880 in words is "thirty-one million, four hundred eighteen thousand, eight hundred eighty".