71969280 has 80 divisors (see below), whose sum is σ = 230101344. Its totient is φ = 19189760.

The previous prime is 71969263. The next prime is 71969291. The reversal of 71969280 is 8296917.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995 + ... + 12365.

Almost surely, 2^71969280 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 71969280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115050672).

71969280 is an abundant number, since it is smaller than the sum of its proper divisors (158132064).

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

71969280 is an equidigital number, since it uses as much as digits as its factorization.

71969280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9397 (or 9381 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 71969280 is about 8483.4709877502. The cubic root of 71969280 is about 415.9575893648.

The spelling of 71969280 in words is "seventy-one million, nine hundred sixty-nine thousand, two hundred eighty".