71244378 has 48 divisors (see below), whose sum is σ = 159999840. Its totient is φ = 22895712.

The previous prime is 71244377. The next prime is 71244391. The reversal of 71244378 is 87344217.

It is a happy number.

It is a super-2 number, since 2×71244378² = 10151522793213768, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71244377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63688 + ... + 64796.

It is an arithmetic number, because the mean of its divisors is an integer number (3333330).

Almost surely, 2^71244378 is an apocalyptic number.

71244378 is an abundant number, since it is smaller than the sum of its proper divisors (88755462).

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

71244378 is a wasteful number, since it uses less digits than its factorization.

71244378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243 (or 1240 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 71244378 is about 8440.6384829585. The cubic root of 71244378 is about 414.5563129606.

The spelling of 71244378 in words is "seventy-one million, two hundred forty-four thousand, three hundred seventy-eight".