31470930 has 64 divisors (see below), whose sum is σ = 85017600. Its totient is φ = 8386416.

The previous prime is 31470917. The next prime is 31470941. The reversal of 31470930 is 3907413.

It is a hoax number, since the sum of its digits (27) 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 (27).

It is a junction number, because it is equal to n+sod(n) for n = 31470894 and 31470903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21151 + ... + 22589.

It is an arithmetic number, because the mean of its divisors is an integer number (1328400).

Almost surely, 2^31470930 is an apocalyptic number.

31470930 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 31470930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42508800).

31470930 is an abundant number, since it is smaller than the sum of its proper divisors (53546670).

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

31470930 is an equidigital number, since it uses as much as digits as its factorization.

31470930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1449 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 31470930 is about 5609.8957209560. The cubic root of 31470930 is about 315.7207983556.

It can be divided in two parts, 31470 and 930, that added together give a square (32400 = 180²).

The spelling of 31470930 in words is "thirty-one million, four hundred seventy thousand, nine hundred thirty".