71402688 has 112 divisors (see below), whose sum is σ = 239938560. Its totient is φ = 20397312.

The previous prime is 71402663. The next prime is 71402699. The reversal of 71402688 is 88620417.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9145 + ... + 15047.

Almost surely, 2^71402688 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 71402688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119969280).

71402688 is an abundant number, since it is smaller than the sum of its proper divisors (168535872).

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

71402688 is a wasteful number, since it uses less digits than its factorization.

71402688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5931 (or 5915 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 71402688 is about 8450.0111242530. The cubic root of 71402688 is about 414.8631435314.

The spelling of 71402688 in words is "seventy-one million, four hundred two thousand, six hundred eighty-eight".