71428536 has 48 divisors (see below), whose sum is σ = 194954760. Its totient is φ = 23624640.

The previous prime is 71428531. The next prime is 71428541. The reversal of 71428536 is 63582417.

It is an interprime number because it is at equal distance from previous prime (71428531) and next prime (71428541).

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

It is a self number, because there is not a number n which added to its sum of digits gives 71428536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71428531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5646 + ... + 13218.

Almost surely, 2^71428536 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 71428536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97477380).

71428536 is an abundant number, since it is smaller than the sum of its proper divisors (123526224).

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

71428536 is a wasteful number, since it uses less digits than its factorization.

71428536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7716 (or 7709 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 71428536 is about 8451.5404513024. The cubic root of 71428536 is about 414.9131980841.

The spelling of 71428536 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred thirty-six".