71023638 has 32 divisors (see below), whose sum is σ = 165657600. Its totient is φ = 20291880.

The previous prime is 71023633. The next prime is 71023649. The reversal of 71023638 is 83632017.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71023633) 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, 15198 + ... + 19313.

It is an arithmetic number, because the mean of its divisors is an integer number (5176800).

Almost surely, 2^71023638 is an apocalyptic number.

71023638 is an abundant number, since it is smaller than the sum of its proper divisors (94633962).

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

71023638 is a wasteful number, since it uses less digits than its factorization.

71023638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34537 (or 34523 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 71023638 is about 8427.5523136911. The cubic root of 71023638 is about 414.1277232003.

The spelling of 71023638 in words is "seventy-one million, twenty-three thousand, six hundred thirty-eight".