31744020 has 96 divisors (see below), whose sum is σ = 110831616. Its totient is φ = 6595200.

The previous prime is 31744007. The next prime is 31744021. The reversal of 31744020 is 2044713.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31744021) 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, 1185 + ... + 8055.

It is an arithmetic number, because the mean of its divisors is an integer number (1154496).

Almost surely, 2^31744020 is an apocalyptic number.

31744020 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 31744020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55415808).

31744020 is an abundant number, since it is smaller than the sum of its proper divisors (79087596).

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

31744020 is a wasteful number, since it uses less digits than its factorization.

31744020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6901 (or 6899 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 31744020 is about 5634.1831706113. The cubic root of 31744020 is about 316.6313952713.

Adding to 31744020 its reverse (2044713), we get a palindrome (33788733).

The spelling of 31744020 in words is "thirty-one million, seven hundred forty-four thousand, twenty".