181970712 has 240 divisors, whose sum is σ = 648042120. Its totient is φ = 47174400.

The previous prime is 181970707. The next prime is 181970717. The reversal of 181970712 is 217079181.

It is an interprime number because it is at equal distance from previous prime (181970707) and next prime (181970717).

It is a super-2 number, since 2×181970712² = 66226680051573888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181970717) by changing a digit.

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 59 ways as a sum of consecutive naturals, for example, 349012 + ... + 349532.

Almost surely, 2^181970712 is an apocalyptic number.

181970712 is a gapful number since it is divisible by the number (12) 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 181970712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324021060).

181970712 is an abundant number, since it is smaller than the sum of its proper divisors (466071408).

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

181970712 is a wasteful number, since it uses less digits than its factorization.

181970712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 36.

The square root of 181970712 is about 13489.6520340593. The cubic root of 181970712 is about 566.6747105356.

The spelling of 181970712 in words is "one hundred eighty-one million, nine hundred seventy thousand, seven hundred twelve".