71428678 has 4 divisors (see below), whose sum is σ = 107143020. Its totient is φ = 35714338.

The previous prime is 71428631. The next prime is 71428691. The reversal of 71428678 is 87682417.

It is a semiprime because it is the product of two primes.

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, 17857168 + ... + 17857171.

It is an arithmetic number, because the mean of its divisors is an integer number (26785755).

Almost surely, 2^71428678 is an apocalyptic number.

71428678 is a deficient number, since it is larger than the sum of its proper divisors (35714342).

71428678 is a wasteful number, since it uses less digits than its factorization.

71428678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35714341.

The product of its digits is 150528, while the sum is 43.

The square root of 71428678 is about 8451.5488521336. The cubic root of 71428678 is about 414.9134730332.

It can be divided in two parts, 714 and 28678, that added together give a palindrome (29392).

The spelling of 71428678 in words is "seventy-one million, four hundred twenty-eight thousand, six hundred seventy-eight".