71840248 has 8 divisors (see below), whose sum is σ = 134700480. Its totient is φ = 35920120.

The previous prime is 71840239. The next prime is 71840261. The reversal of 71840248 is 84204817.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×71840248² = 10322042465403008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4490008 + ... + 4490023.

It is an arithmetic number, because the mean of its divisors is an integer number (16837560).

Almost surely, 2^71840248 is an apocalyptic number.

It is an amenable number.

71840248 is a deficient number, since it is larger than the sum of its proper divisors (62860232).

71840248 is a wasteful number, since it uses less digits than its factorization.

71840248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8980037 (or 8980033 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 71840248 is about 8475.8626699587. The cubic root of 71840248 is about 415.7088538520.

The spelling of 71840248 in words is "seventy-one million, eight hundred forty thousand, two hundred forty-eight".