71279898 has 16 divisors (see below), whose sum is σ = 148758336. Its totient is φ = 22726880.

The previous prime is 71279843. The next prime is 71279899. The reversal of 71279898 is 89897217.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71279898.

It is not an unprimeable number, because it can be changed into a prime (71279899) 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, 258123 + ... + 258398.

It is an arithmetic number, because the mean of its divisors is an integer number (9297396).

Almost surely, 2^71279898 is an apocalyptic number.

71279898 is an abundant number, since it is smaller than the sum of its proper divisors (77478438).

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

71279898 is a wasteful number, since it uses less digits than its factorization.

71279898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516549.

The product of its digits is 508032, while the sum is 51.

The square root of 71279898 is about 8442.7423269930. The cubic root of 71279898 is about 414.6251960275.

The spelling of 71279898 in words is "seventy-one million, two hundred seventy-nine thousand, eight hundred ninety-eight".