31411020 has 48 divisors (see below), whose sum is σ = 88558848. Its totient is φ = 8318400.

The previous prime is 31410997. The next prime is 31411021. The reversal of 31411020 is 2011413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 31410987 and 31411005.

It is not an unprimeable number, because it can be changed into a prime (31411021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7327 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (1844976).

Almost surely, 2^31411020 is an apocalyptic number.

31411020 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 31411020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44279424).

31411020 is an abundant number, since it is smaller than the sum of its proper divisors (57147828).

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

31411020 is a wasteful number, since it uses less digits than its factorization.

31411020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630 (or 3628 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 31411020 is about 5604.5535058558. The cubic root of 31411020 is about 315.5203292431.

Adding to 31411020 its reverse (2011413), we get a palindrome (33422433).

The spelling of 31411020 in words is "thirty-one million, four hundred eleven thousand, twenty".