71225840 has 40 divisors (see below), whose sum is σ = 189258720. Its totient is φ = 24420096.

The previous prime is 71225837. The next prime is 71225867. The reversal of 71225840 is 4852217.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63035 + ... + 64154.

It is an arithmetic number, because the mean of its divisors is an integer number (4731468).

Almost surely, 2^71225840 is an apocalyptic number.

71225840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71225840 is an abundant number, since it is smaller than the sum of its proper divisors (118032880).

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

71225840 is a wasteful number, since it uses less digits than its factorization.

71225840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127209 (or 127203 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 71225840 is about 8439.5402718395. The cubic root of 71225840 is about 414.5203535778.

The spelling of 71225840 in words is "seventy-one million, two hundred twenty-five thousand, eight hundred forty".