71944880 has 40 divisors (see below), whose sum is σ = 191169312. Its totient is φ = 24666624.

The previous prime is 71944879. The next prime is 71944889. The reversal of 71944880 is 8844917.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (71944889) 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 7 ways as a sum of consecutive naturals, for example, 63677 + ... + 64796.

Almost surely, 2^71944880 is an apocalyptic number.

71944880 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71944880 is an abundant number, since it is smaller than the sum of its proper divisors (119224432).

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

71944880 is a wasteful number, since it uses less digits than its factorization.

71944880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128493 (or 128487 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 71944880 is about 8482.0327752255. The cubic root of 71944880 is about 415.9105761929.

The spelling of 71944880 in words is "seventy-one million, nine hundred forty-four thousand, eight hundred eighty".