71387248 has 10 divisors (see below), whose sum is σ = 138312824. Its totient is φ = 35693616.

The previous prime is 71387231. The next prime is 71387279. The reversal of 71387248 is 84278317.

It is a super-2 number, since 2×71387248² = 10192278354027008, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71387248.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2230836 + ... + 2230867.

Almost surely, 2^71387248 is an apocalyptic number.

It is an amenable number.

71387248 is a deficient number, since it is larger than the sum of its proper divisors (66925576).

71387248 is a wasteful number, since it uses less digits than its factorization.

71387248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461711 (or 4461705 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 71387248 is about 8449.0974665937. The cubic root of 71387248 is about 414.8332382675.

The spelling of 71387248 in words is "seventy-one million, three hundred eighty-seven thousand, two hundred forty-eight".