71646040 has 32 divisors (see below), whose sum is σ = 161520480. Its totient is φ = 28602112.

The previous prime is 71645999. The next prime is 71646059. The reversal of 71646040 is 4064617.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23229 + ... + 26131.

It is an arithmetic number, because the mean of its divisors is an integer number (5047515).

Almost surely, 2^71646040 is an apocalyptic number.

It is an amenable number.

71646040 is an abundant number, since it is smaller than the sum of its proper divisors (89874440).

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

71646040 is a wasteful number, since it uses less digits than its factorization.

71646040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531 (or 3527 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 71646040 is about 8464.3983838191. The cubic root of 71646040 is about 415.3339161857. Note that the first 3 decimals are identical.

The spelling of 71646040 in words is "seventy-one million, six hundred forty-six thousand, forty".