31018480 has 80 divisors (see below), whose sum is σ = 75423744. Its totient is φ = 11854080.

The previous prime is 31018453. The next prime is 31018529. The reversal of 31018480 is 8481013.

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

It is a super-2 number, since 2×31018480² = 1924292203020800, which contains 22 as substring.

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, 244177 + ... + 244303.

Almost surely, 2^31018480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31018480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37711872).

31018480 is an abundant number, since it is smaller than the sum of its proper divisors (44405264).

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

31018480 is a wasteful number, since it uses less digits than its factorization.

31018480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 31018480 is about 5569.4236685675. The cubic root of 31018480 is about 314.2004751129.

Adding to 31018480 its reverse (8481013), we get a palindrome (39499493).

The spelling of 31018480 in words is "thirty-one million, eighteen thousand, four hundred eighty".