71912880 has 240 divisors, whose sum is σ = 269580960. Its totient is φ = 17611776.

The previous prime is 71912833. The next prime is 71912921. The reversal of 71912880 is 8821917.

It is a tau number, because it is divible by the number of its divisors (240).

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

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 47 ways as a sum of consecutive naturals, for example, 364942 + ... + 365138.

It is an arithmetic number, because the mean of its divisors is an integer number (1123254).

Almost surely, 2^71912880 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 71912880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134790480).

71912880 is an abundant number, since it is smaller than the sum of its proper divisors (197668080).

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

71912880 is a wasteful number, since it uses less digits than its factorization.

71912880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 71912880 is about 8480.1462251544. The cubic root of 71912880 is about 415.8489034598.

The spelling of 71912880 in words is "seventy-one million, nine hundred twelve thousand, eight hundred eighty".