71533746 has 64 divisors (see below), whose sum is σ = 169084800. Its totient is φ = 22353408.

The previous prime is 71533741. The next prime is 71533747. The reversal of 71533746 is 64733517.

It is a self number, because there is not a number n which added to its sum of digits gives 71533746.

It is not an unprimeable number, because it can be changed into a prime (71533741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115630 + ... + 116246.

It is an arithmetic number, because the mean of its divisors is an integer number (2641950).

Almost surely, 2^71533746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71533746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84542400).

71533746 is an abundant number, since it is smaller than the sum of its proper divisors (97551054).

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

71533746 is a wasteful number, since it uses less digits than its factorization.

71533746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 754 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The square root of 71533746 is about 8457.7624700626. The cubic root of 71533746 is about 415.1168123293.

The spelling of 71533746 in words is "seventy-one million, five hundred thirty-three thousand, seven hundred forty-six".