71729070 has 64 divisors (see below), whose sum is σ = 199480320. Its totient is φ = 16167168.

The previous prime is 71729057. The next prime is 71729083. The reversal of 71729070 is 7092717.

It is an interprime number because it is at equal distance from previous prime (71729057) and next prime (71729083).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12991 + ... + 17669.

It is an arithmetic number, because the mean of its divisors is an integer number (3116880).

Almost surely, 2^71729070 is an apocalyptic number.

71729070 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 71729070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99740160).

71729070 is an abundant number, since it is smaller than the sum of its proper divisors (127751250).

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

71729070 is a wasteful number, since it uses less digits than its factorization.

71729070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769.

The product of its (nonzero) digits is 6174, while the sum is 33.

The square root of 71729070 is about 8469.3016241010. The cubic root of 71729070 is about 415.4942965878.

The spelling of 71729070 in words is "seventy-one million, seven hundred twenty-nine thousand, seventy".