71279404 has 24 divisors (see below), whose sum is σ = 144281088. Its totient is φ = 30179280.

The previous prime is 71279389. The next prime is 71279407. The reversal of 71279404 is 40497217.

It is a self number, because there is not a number n which added to its sum of digits gives 71279404.

It is not an unprimeable number, because it can be changed into a prime (71279407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13012 + ... + 17659.

It is an arithmetic number, because the mean of its divisors is an integer number (6011712).

Almost surely, 2^71279404 is an apocalyptic number.

It is an amenable number.

71279404 is an abundant number, since it is smaller than the sum of its proper divisors (73001684).

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

71279404 is a wasteful number, since it uses less digits than its factorization.

71279404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30765 (or 30763 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 71279404 is about 8442.7130710453. The cubic root of 71279404 is about 414.6242381823.

The spelling of 71279404 in words is "seventy-one million, two hundred seventy-nine thousand, four hundred four".