71403571428 has 192 divisors, whose sum is σ = 206659289088. Its totient is φ = 18723133440.

The previous prime is 71403571423. The next prime is 71403571457. The reversal of 71403571428 is 82417530417.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 71403571428.

It is not an unprimeable number, because it can be changed into a prime (71403571423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19663173 + ... + 19666803.

It is an arithmetic number, because the mean of its divisors is an integer number (1076350464).

Almost surely, 2^71403571428 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 71403571428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103329644544).

71403571428 is an abundant number, since it is smaller than the sum of its proper divisors (135255717660).

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

71403571428 is a wasteful number, since it uses less digits than its factorization.

71403571428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002 (or 4000 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 71403571428 in words is "seventy-one billion, four hundred three million, five hundred seventy-one thousand, four hundred twenty-eight".