71067620 has 48 divisors (see below), whose sum is σ = 161838768. Its totient is φ = 26058240.

The previous prime is 71067587. The next prime is 71067629. The reversal of 71067620 is 2676017.

It can be written as a sum of positive squares in 8 ways, for example, as 32924644 + 38142976 = 5738^2 + 6176^2 .

It is a super-2 number, since 2×71067620² = 10101213224928800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71067629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39950 + ... + 41690.

It is an arithmetic number, because the mean of its divisors is an integer number (3371641).

Almost surely, 2^71067620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71067620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80919384).

71067620 is an abundant number, since it is smaller than the sum of its proper divisors (90771148).

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

71067620 is a wasteful number, since it uses less digits than its factorization.

71067620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 71067620 is about 8430.1613270447. The cubic root of 71067620 is about 414.2131896148.

The spelling of 71067620 in words is "seventy-one million, sixty-seven thousand, six hundred twenty".