71880398 has 4 divisors (see below), whose sum is σ = 107820600. Its totient is φ = 35940198.

The previous prime is 71880397. The next prime is 71880433. The reversal of 71880398 is 89308817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89308817 = 13 ⋅6869909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71880397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17970098 + ... + 17970101.

It is an arithmetic number, because the mean of its divisors is an integer number (26955150).

Almost surely, 2^71880398 is an apocalyptic number.

71880398 is a deficient number, since it is larger than the sum of its proper divisors (35940202).

71880398 is a wasteful number, since it uses less digits than its factorization.

71880398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35940201.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 71880398 is about 8478.2308296012. The cubic root of 71880398 is about 415.7862830672.

The spelling of 71880398 in words is "seventy-one million, eight hundred eighty thousand, three hundred ninety-eight".