71920038 has 16 divisors (see below), whose sum is σ = 145811376. Its totient is φ = 23644800.

The previous prime is 71920033. The next prime is 71920039. The reversal of 71920038 is 83002917.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 71919987 and 71920014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71920033) 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, 81663 + ... + 82538.

It is an arithmetic number, because the mean of its divisors is an integer number (9113211).

Almost surely, 2^71920038 is an apocalyptic number.

71920038 is an abundant number, since it is smaller than the sum of its proper divisors (73891338).

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

71920038 is a wasteful number, since it uses less digits than its factorization.

71920038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164279.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 71920038 is about 8480.5682592619. The cubic root of 71920038 is about 415.8627004676.

The spelling of 71920038 in words is "seventy-one million, nine hundred twenty thousand, thirty-eight".