31484880 has 120 divisors (see below), whose sum is σ = 120861312. Its totient is φ = 7195392.

The previous prime is 31484863. The next prime is 31484903. The reversal of 31484880 is 8848413.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×31484880² = 1982595337228800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1917 + ... + 8163.

Almost surely, 2^31484880 is an apocalyptic number.

31484880 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 31484880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60430656).

31484880 is an abundant number, since it is smaller than the sum of its proper divisors (89376432).

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

31484880 is a wasteful number, since it uses less digits than its factorization.

31484880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6273 (or 6264 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 31484880 is about 5611.1389218233. The cubic root of 31484880 is about 315.7674409189.

The spelling of 31484880 in words is "thirty-one million, four hundred eighty-four thousand, eight hundred eighty".