71408404 has 6 divisors (see below), whose sum is σ = 124964714. Its totient is φ = 35704200.

The previous prime is 71408401. The next prime is 71408419. The reversal of 71408404 is 40480417.

It can be written as a sum of positive squares in only one way, i.e., 53260804 + 18147600 = 7298^2 + 4260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71408401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8926047 + ... + 8926054.

Almost surely, 2^71408404 is an apocalyptic number.

It is an amenable number.

71408404 is a deficient number, since it is larger than the sum of its proper divisors (53556310).

71408404 is a wasteful number, since it uses less digits than its factorization.

71408404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17852105 (or 17852103 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 71408404 is about 8450.3493418911. The cubic root of 71408404 is about 414.8742135836.

The spelling of 71408404 in words is "seventy-one million, four hundred eight thousand, four hundred four".