71403956 has 12 divisors (see below), whose sum is σ = 134569092. Its totient is φ = 32955648.

The previous prime is 71403923. The next prime is 71404009. The reversal of 71403956 is 65930417.

It can be written as a sum of positive squares in 2 ways, for example, as 24344356 + 47059600 = 4934^2 + 6860^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686525 + ... + 686628.

It is an arithmetic number, because the mean of its divisors is an integer number (11214091).

Almost surely, 2^71403956 is an apocalyptic number.

It is an amenable number.

71403956 is a deficient number, since it is larger than the sum of its proper divisors (63165136).

71403956 is a wasteful number, since it uses less digits than its factorization.

71403956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373170 (or 1373168 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 71403956 is about 8450.0861534070. The cubic root of 71403956 is about 414.8655992903.

The spelling of 71403956 in words is "seventy-one million, four hundred three thousand, nine hundred fifty-six".