71834070 has 128 divisors (see below), whose sum is σ = 217562112. Its totient is φ = 14868480.

The previous prime is 71834051. The next prime is 71834071. The reversal of 71834070 is 7043817.

It is a happy number.

It is a super-2 number, since 2×71834070² = 10320267225529800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71834071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 279382 + ... + 279638.

It is an arithmetic number, because the mean of its divisors is an integer number (1699704).

Almost surely, 2^71834070 is an apocalyptic number.

71834070 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71834070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108781056).

71834070 is an abundant number, since it is smaller than the sum of its proper divisors (145728042).

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

71834070 is a wasteful number, since it uses less digits than its factorization.

71834070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 71834070 is about 8475.4982154443. The cubic root of 71834070 is about 415.6969370273.

Adding to 71834070 its reverse (7043817), we get a palindrome (78877887).

The spelling of 71834070 in words is "seventy-one million, eight hundred thirty-four thousand, seventy".