71369440 has 48 divisors (see below), whose sum is σ = 174061440. Its totient is φ = 27624960.

The previous prime is 71369423. The next prime is 71369443. The reversal of 71369440 is 4496317.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 71369396 and 71369405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71369443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2235 + ... + 12154.

It is an arithmetic number, because the mean of its divisors is an integer number (3626280).

Almost surely, 2^71369440 is an apocalyptic number.

It is an amenable number.

71369440 is an abundant number, since it is smaller than the sum of its proper divisors (102692000).

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

71369440 is a wasteful number, since it uses less digits than its factorization.

71369440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14435 (or 14427 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 71369440 is about 8448.0435604938. The cubic root of 71369440 is about 414.7987411415.

The spelling of 71369440 in words is "seventy-one million, three hundred sixty-nine thousand, four hundred forty".