71694720 has 192 divisors, whose sum is σ = 257297040. Its totient is φ = 19077120.

The previous prime is 71694697. The next prime is 71694739. The reversal of 71694720 is 2749617.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 155290 + ... + 155750.

Almost surely, 2^71694720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71694720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128648520).

71694720 is an abundant number, since it is smaller than the sum of its proper divisors (185602320).

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

71694720 is an equidigital number, since it uses as much as digits as its factorization.

71694720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 71694720 is about 8467.2734690690. The cubic root of 71694720 is about 415.4279612886.

The spelling of 71694720 in words is "seventy-one million, six hundred ninety-four thousand, seven hundred twenty".