78272705 has 8 divisors (see below), whose sum is σ = 107345472. Its totient is φ = 53672688.

The previous prime is 78272693. The next prime is 78272759. The reversal of 78272705 is 50727287.

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

It is a cyclic number.

It is not a de Polignac number, because 78272705 - 2¹⁰ = 78271681 is a prime.

It is a super-2 number, since 2×78272705² = 12253232696034050, which contains 22 as substring.

It is a Duffinian 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 in 7 ways as a sum of consecutive naturals, for example, 1118147 + ... + 1118216.

It is an arithmetic number, because the mean of its divisors is an integer number (13418184).

Almost surely, 2^78272705 is an apocalyptic number.

It is an amenable number.

78272705 is a deficient number, since it is larger than the sum of its proper divisors (29072767).

78272705 is a wasteful number, since it uses less digits than its factorization.

78272705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236375.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 78272705 is about 8847.1862758733. The cubic root of 78272705 is about 427.7632271932.

The spelling of 78272705 in words is "seventy-eight million, two hundred seventy-two thousand, seven hundred five".