31488030 has 96 divisors (see below), whose sum is σ = 94468608. Its totient is φ = 7128000.

The previous prime is 31488019. The next prime is 31488031. The reversal of 31488030 is 3088413.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31487985 and 31488003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31488031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94965 + ... + 95295.

It is an arithmetic number, because the mean of its divisors is an integer number (984048).

Almost surely, 2^31488030 is an apocalyptic number.

31488030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31488030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47234304).

31488030 is an abundant number, since it is smaller than the sum of its proper divisors (62980578).

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

31488030 is a wasteful number, since it uses less digits than its factorization.

31488030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 31488030 is about 5611.4196064811. The cubic root of 31488030 is about 315.7779712038. Note that the first 3 decimals are identical.

The spelling of 31488030 in words is "thirty-one million, four hundred eighty-eight thousand, thirty".