71974530 has 96 divisors (see below), whose sum is σ = 194088960. Its totient is φ = 18495360.

The previous prime is 71974523. The next prime is 71974537. The reversal of 71974530 is 3547917.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71974523) and next prime (71974537).

It is not an unprimeable number, because it can be changed into a prime (71974537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 376735 + ... + 376925.

It is an arithmetic number, because the mean of its divisors is an integer number (2021760).

Almost surely, 2^71974530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71974530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97044480).

71974530 is an abundant number, since it is smaller than the sum of its proper divisors (122114430).

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

71974530 is a wasteful number, since it uses less digits than its factorization.

71974530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 71974530 is about 8483.7804073420. The cubic root of 71974530 is about 415.9677035146.

The spelling of 71974530 in words is "seventy-one million, nine hundred seventy-four thousand, five hundred thirty".