71208240 has 160 divisors (see below), whose sum is σ = 241698816. Its totient is φ = 17264640.

The previous prime is 71208229. The next prime is 71208287. The reversal of 71208240 is 4280217.

It is a super-2 number, since 2×71208240² = 10141226887795200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 71208240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126199 + ... + 126761.

Almost surely, 2^71208240 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 71208240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120849408).

71208240 is an abundant number, since it is smaller than the sum of its proper divisors (170490576).

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

71208240 is a wasteful number, since it uses less digits than its factorization.

71208240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 71208240 is about 8438.4974965926. The cubic root of 71208240 is about 414.4862079212.

Adding to 71208240 its reverse (4280217), we get a palindrome (75488457).

The spelling of 71208240 in words is "seventy-one million, two hundred eight thousand, two hundred forty".