71264020 has 24 divisors (see below), whose sum is σ = 154816200. Its totient is φ = 27522432.

The previous prime is 71263979. The next prime is 71264021. The reversal of 71264020 is 2046217.

It can be written as a sum of positive squares in 4 ways, for example, as 19395216 + 51868804 = 4404^2 + 7202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71263982 and 71264000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71264021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60855 + ... + 62014.

It is an arithmetic number, because the mean of its divisors is an integer number (6450675).

Almost surely, 2^71264020 is an apocalyptic number.

It is an amenable number.

71264020 is an abundant number, since it is smaller than the sum of its proper divisors (83552180).

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

71264020 is a wasteful number, since it uses less digits than its factorization.

71264020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122907 (or 122905 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 71264020 is about 8441.8019403443. The cubic root of 71264020 is about 414.5944070396.

The spelling of 71264020 in words is "seventy-one million, two hundred sixty-four thousand, twenty".