71467440 has 240 divisors, whose sum is σ = 256483584. Its totient is φ = 16417280.

The previous prime is 71467381. The next prime is 71467441. The reversal of 71467440 is 4476417.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (71467441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 667867 + ... + 667973.

Almost surely, 2^71467440 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 71467440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128241792).

71467440 is an abundant number, since it is smaller than the sum of its proper divisors (185016144).

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

71467440 is a wasteful number, since it uses less digits than its factorization.

71467440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 71467440 is about 8453.8417302431. The cubic root of 71467440 is about 414.9885127705.

The spelling of 71467440 in words is "seventy-one million, four hundred sixty-seven thousand, four hundred forty".