31480000 has 70 divisors (see below), whose sum is σ = 78159356. Its totient is φ = 12576000.

The previous prime is 31479961. The next prime is 31480019. The reversal of 31480000 is 8413.

It is a super-3 number, since 3×31480000³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39607 + ... + 40393.

Almost surely, 2^31480000 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 31480000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39079678).

31480000 is an abundant number, since it is smaller than the sum of its proper divisors (46679356).

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

31480000 is an frugal number, since it uses more digits than its factorization.

31480000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31480000 is about 5610.7040556422. The cubic root of 31480000 is about 315.7511259477.

Adding to 31480000 its reverse (8413), we get a palindrome (31488413).

The spelling of 31480000 in words is "thirty-one million, four hundred eighty thousand".