31044020 has 96 divisors (see below), whose sum is σ = 80510976. Its totient is φ = 9820800.

The previous prime is 31044019. The next prime is 31044029. The reversal of 31044020 is 2044013.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 31043986 and 31044004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31044029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99665 + ... + 99975.

It is an arithmetic number, because the mean of its divisors is an integer number (838656).

Almost surely, 2^31044020 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 31044020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40255488).

31044020 is an abundant number, since it is smaller than the sum of its proper divisors (49466956).

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

31044020 is a wasteful number, since it uses less digits than its factorization.

31044020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31044020 is about 5571.7160731681. The cubic root of 31044020 is about 314.2866869313.

Adding to 31044020 its reverse (2044013), we get a palindrome (33088033).

The spelling of 31044020 in words is "thirty-one million, forty-four thousand, twenty".