71073040 has 20 divisors (see below), whose sum is σ = 165245004. Its totient is φ = 28429184.

The previous prime is 71073031. The next prime is 71073043. The reversal of 71073040 is 4037017.

It can be written as a sum of positive squares in 2 ways, for example, as 41783296 + 29289744 = 6464^2 + 5412^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (71073043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444127 + ... + 444286.

Almost surely, 2^71073040 is an apocalyptic number.

It is an amenable number.

71073040 is an abundant number, since it is smaller than the sum of its proper divisors (94171964).

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

71073040 is a wasteful number, since it uses less digits than its factorization.

71073040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888426 (or 888420 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 71073040 is about 8430.4827857009. The cubic root of 71073040 is about 414.2237193911.

The spelling of 71073040 in words is "seventy-one million, seventy-three thousand, forty".