71709408 has 48 divisors (see below), whose sum is σ = 209154960. Its totient is φ = 23902848.

The previous prime is 71709397. The next prime is 71709409. The reversal of 71709408 is 80490717.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71709409) 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, 40635 + ... + 42362.

It is an arithmetic number, because the mean of its divisors is an integer number (4357395).

Almost surely, 2^71709408 is an apocalyptic number.

It is an amenable number.

71709408 is an abundant number, since it is smaller than the sum of its proper divisors (137445552).

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

71709408 is a wasteful number, since it uses less digits than its factorization.

71709408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83016 (or 83002 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 71709408 is about 8468.1407640639. The cubic root of 71709408 is about 415.4563287391.

The spelling of 71709408 in words is "seventy-one million, seven hundred nine thousand, four hundred eight".