78642002 has 16 divisors (see below), whose sum is σ = 120748320. Its totient is φ = 38403552.

The previous prime is 78641999. The next prime is 78642023. The reversal of 78642002 is 20024687.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12113 + ... + 17435.

It is an arithmetic number, because the mean of its divisors is an integer number (7546770).

Almost surely, 2^78642002 is an apocalyptic number.

78642002 is a deficient number, since it is larger than the sum of its proper divisors (42106318).

78642002 is a wasteful number, since it uses less digits than its factorization.

78642002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 78642002 is about 8868.0325890245. The cubic root of 78642002 is about 428.4349125297.

Adding to 78642002 its reverse (20024687), we get a palindrome (98666689).

The spelling of 78642002 in words is "seventy-eight million, six hundred forty-two thousand, two".