71349540 has 24 divisors (see below), whose sum is σ = 199778880. Its totient is φ = 19026528.

The previous prime is 71349517. The next prime is 71349557. The reversal of 71349540 is 4594317.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594520 + ... + 594639.

It is an arithmetic number, because the mean of its divisors is an integer number (8324120).

Almost surely, 2^71349540 is an apocalyptic number.

It is an amenable number.

71349540 is an abundant number, since it is smaller than the sum of its proper divisors (128429340).

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

71349540 is a wasteful number, since it uses less digits than its factorization.

71349540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189171 (or 1189169 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 71349540 is about 8446.8656908939. The cubic root of 71349540 is about 414.7601846656.

The spelling of 71349540 in words is "seventy-one million, three hundred forty-nine thousand, five hundred forty".