71650720 has 24 divisors (see below), whose sum is σ = 169275204. Its totient is φ = 28660224.

The previous prime is 71650693. The next prime is 71650723. The reversal of 71650720 is 2705617.

It can be written as a sum of positive squares in 2 ways, for example, as 65480464 + 6170256 = 8092^2 + 2484^2 .

It is not an unprimeable number, because it can be changed into a prime (71650723) 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, 223749 + ... + 224068.

Almost surely, 2^71650720 is an apocalyptic number.

It is an amenable number.

71650720 is an abundant number, since it is smaller than the sum of its proper divisors (97624484).

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

71650720 is a wasteful number, since it uses less digits than its factorization.

71650720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447832 (or 447824 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 71650720 is about 8464.6748313210. The cubic root of 71650720 is about 415.3429593485.

The spelling of 71650720 in words is "seventy-one million, six hundred fifty thousand, seven hundred twenty".