71039920 has 40 divisors (see below), whose sum is σ = 188764704. Its totient is φ = 24356352.

The previous prime is 71039869. The next prime is 71039933. The reversal of 71039920 is 2993017.

71039920 = T₄₇₅ + T₄₇₆ + ... + T₈₁₀.

It is a tau number, because it is divible by the number of its divisors (40).

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, 62869 + ... + 63988.

Almost surely, 2^71039920 is an apocalyptic number.

71039920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71039920 is an abundant number, since it is smaller than the sum of its proper divisors (117724784).

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

71039920 is a wasteful number, since it uses less digits than its factorization.

71039920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126877 (or 126871 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 71039920 is about 8428.5182564909. The cubic root of 71039920 is about 414.1593667140.

The spelling of 71039920 in words is "seventy-one million, thirty-nine thousand, nine hundred twenty".