71839485 has 12 divisors (see below), whose sum is σ = 124521852. Its totient is φ = 38314368.

The previous prime is 71839429. The next prime is 71839487. The reversal of 71839485 is 58493817.

It can be written as a sum of positive squares in 2 ways, for example, as 51236964 + 20602521 = 7158^2 + 4539^2 .

It is not a de Polignac number, because 71839485 - 2⁷ = 71839357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1596433 = 71839485 / (7 + 1 + 8 + 3 + 9 + 4 + 8 + 5).

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 71839485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71839487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 798172 + ... + 798261.

It is an arithmetic number, because the mean of its divisors is an integer number (10376821).

Almost surely, 2^71839485 is an apocalyptic number.

It is an amenable number.

71839485 is a deficient number, since it is larger than the sum of its proper divisors (52682367).

71839485 is a wasteful number, since it uses less digits than its factorization.

71839485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596444 (or 1596441 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 71839485 is about 8475.8176596715. The cubic root of 71839485 is about 415.7073821283.

The spelling of 71839485 in words is "seventy-one million, eight hundred thirty-nine thousand, four hundred eighty-five".