71424288 has 96 divisors (see below), whose sum is σ = 224380800. Its totient is φ = 21973248.

The previous prime is 71424281. The next prime is 71424289. The reversal of 71424288 is 88242417.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (71424281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8053 + ... + 14411.

It is an arithmetic number, because the mean of its divisors is an integer number (2337300).

Almost surely, 2^71424288 is an apocalyptic number.

71424288 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71424288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112190400).

71424288 is an abundant number, since it is smaller than the sum of its proper divisors (152956512).

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

71424288 is a wasteful number, since it uses less digits than its factorization.

71424288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391 (or 6377 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 71424288 is about 8451.2891324342. The cubic root of 71424288 is about 414.9049726777.

The spelling of 71424288 in words is "seventy-one million, four hundred twenty-four thousand, two hundred eighty-eight".