71671424 has 64 divisors (see below), whose sum is σ = 157528800. Its totient is φ = 32209920.

The previous prime is 71671409. The next prime is 71671429. The reversal of 71671424 is 42417617.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (71671429) 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, 153239 + ... + 153705.

Almost surely, 2^71671424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71671424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78764400).

71671424 is an abundant number, since it is smaller than the sum of its proper divisors (85857376).

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

71671424 is a wasteful number, since it uses less digits than its factorization.

71671424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 589 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 71671424 is about 8465.8977078630. The cubic root of 71671424 is about 415.3829609586.

The spelling of 71671424 in words is "seventy-one million, six hundred seventy-one thousand, four hundred twenty-four".