31742070 has 64 divisors (see below), whose sum is σ = 80248320. Its totient is φ = 8019968.

The previous prime is 31742023. The next prime is 31742083. The reversal of 31742070 is 7024713.

It is a self number, because there is not a number n which added to its sum of digits gives 31742070.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123382 + ... + 123638.

It is an arithmetic number, because the mean of its divisors is an integer number (1253880).

Almost surely, 2^31742070 is an apocalyptic number.

31742070 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 31742070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40124160).

31742070 is an abundant number, since it is smaller than the sum of its proper divisors (48506250).

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

31742070 is a wasteful number, since it uses less digits than its factorization.

31742070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 31742070 is about 5634.0101171368. The cubic root of 31742070 is about 316.6249116998.

Adding to 31742070 its reverse (7024713), we get a palindrome (38766783).

The spelling of 31742070 in words is "thirty-one million, seven hundred forty-two thousand, seventy".