71733540 has 48 divisors (see below), whose sum is σ = 212671872. Its totient is φ = 18003456.

The previous prime is 71733521. The next prime is 71733551. The reversal of 71733540 is 4533717.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 71733498 and 71733507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34144 + ... + 36183.

It is an arithmetic number, because the mean of its divisors is an integer number (4430664).

Almost surely, 2^71733540 is an apocalyptic number.

It is an amenable number.

71733540 is an abundant number, since it is smaller than the sum of its proper divisors (140938332).

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

71733540 is a wasteful number, since it uses less digits than its factorization.

71733540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70356 (or 70354 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 71733540 is about 8469.5655142398. The cubic root of 71733540 is about 415.5029273095.

The spelling of 71733540 in words is "seventy-one million, seven hundred thirty-three thousand, five hundred forty".