71445480 has 32 divisors (see below), whose sum is σ = 214336800. Its totient is φ = 19052096.

The previous prime is 71445469. The next prime is 71445511. The reversal of 71445480 is 8454417.

It is a super-2 number, since 2×71445480² = 10208913224860800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 297570 + ... + 297809.

It is an arithmetic number, because the mean of its divisors is an integer number (6698025).

Almost surely, 2^71445480 is an apocalyptic number.

It is an amenable number.

71445480 is an abundant number, since it is smaller than the sum of its proper divisors (142891320).

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

71445480 is a wasteful number, since it uses less digits than its factorization.

71445480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595393 (or 595389 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 71445480 is about 8452.5428126689. The cubic root of 71445480 is about 414.9460035229.

Adding to 71445480 its reverse (8454417), we get a palindrome (79899897).

The spelling of 71445480 in words is "seventy-one million, four hundred forty-five thousand, four hundred eighty".