71367440 has 20 divisors (see below), whose sum is σ = 165929484. Its totient is φ = 28546944.

The previous prime is 71367437. The next prime is 71367449. The reversal of 71367440 is 4476317.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13424896 + 57942544 = 3664^2 + 7612^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×71367440² = 10186622984307200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71367397 and 71367406.

It is not an unprimeable number, because it can be changed into a prime (71367449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445967 + ... + 446126.

Almost surely, 2^71367440 is an apocalyptic number.

It is an amenable number.

71367440 is an abundant number, since it is smaller than the sum of its proper divisors (94562044).

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

71367440 is a wasteful number, since it uses less digits than its factorization.

71367440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892106 (or 892100 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 71367440 is about 8447.9251890627. The cubic root of 71367440 is about 414.7948664428.

The spelling of 71367440 in words is "seventy-one million, three hundred sixty-seven thousand, four hundred forty".