71428615 has 8 divisors (see below), whose sum is σ = 85777488. Its totient is φ = 57100800.

The previous prime is 71428613. The next prime is 71428631. The reversal of 71428615 is 51682417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71428615 - 2¹ = 71428613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71428613) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3544 + ... + 12466.

It is an arithmetic number, because the mean of its divisors is an integer number (10722186).

Almost surely, 2^71428615 is an apocalyptic number.

71428615 is a deficient number, since it is larger than the sum of its proper divisors (14348873).

71428615 is a wasteful number, since it uses less digits than its factorization.

71428615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10529.

The product of its digits is 13440, while the sum is 34.

The square root of 71428615 is about 8451.5451250052. The cubic root of 71428615 is about 414.9133510488.

The spelling of 71428615 in words is "seventy-one million, four hundred twenty-eight thousand, six hundred fifteen".