71428578 has 32 divisors (see below), whose sum is σ = 154291200. Its totient is φ = 21914496.

The previous prime is 71428571. The next prime is 71428583. The reversal of 71428578 is 87582417.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71428571) 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, 30783 + ... + 33021.

It is an arithmetic number, because the mean of its divisors is an integer number (4821600).

Almost surely, 2^71428578 is an apocalyptic number.

71428578 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

71428578 is an abundant number, since it is smaller than the sum of its proper divisors (82862622).

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

71428578 is a wasteful number, since it uses less digits than its factorization.

71428578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666.

The product of its digits is 125440, while the sum is 42.

The square root of 71428578 is about 8451.5429360561. The cubic root of 71428578 is about 414.9132794071.

It can be divided in two parts, 714 and 28578, that added together give a palindrome (29292).

The spelling of 71428578 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred seventy-eight".