78642027 has 12 divisors (see below), whose sum is σ = 113823840. Its totient is φ = 52321968.

The previous prime is 78642023. The next prime is 78642029. The reversal of 78642027 is 72024687.

78642027 is a `hidden beast` number, since 7 + 8 + 642 + 0 + 2 + 7 = 666.

It is not a de Polignac number, because 78642027 - 2² = 78642023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78641982 and 78642000.

It is not an unprimeable number, because it can be changed into a prime (78642023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4003 + ... + 13164.

It is an arithmetic number, because the mean of its divisors is an integer number (9485320).

Almost surely, 2^78642027 is an apocalyptic number.

78642027 is a deficient number, since it is larger than the sum of its proper divisors (35181813).

78642027 is a wasteful number, since it uses less digits than its factorization.

78642027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17682 (or 17679 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 78642027 is about 8868.0339985816. The cubic root of 78642027 is about 428.4349579290.

The spelling of 78642027 in words is "seventy-eight million, six hundred forty-two thousand, twenty-seven".