71440418 has 16 divisors (see below), whose sum is σ = 128915520. Its totient is φ = 29005776.

The previous prime is 71440387. The next prime is 71440441. The reversal of 71440418 is 81404417.

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, 134021 + ... + 134552.

It is an arithmetic number, because the mean of its divisors is an integer number (8057220).

Almost surely, 2^71440418 is an apocalyptic number.

71440418 is a deficient number, since it is larger than the sum of its proper divisors (57475102).

71440418 is a wasteful number, since it uses less digits than its factorization.

71440418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268601.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 71440418 is about 8452.2433708454. The cubic root of 71440418 is about 414.9362034802.

The spelling of 71440418 in words is "seventy-one million, four hundred forty thousand, four hundred eighteen".