78057055 has 8 divisors (see below), whose sum is σ = 97741152. Its totient is φ = 59730528.

The previous prime is 78057053. The next prime is 78057061. The reversal of 78057055 is 55075087.

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 78057055 - 2¹ = 78057053 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 (78057053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339264 + ... + 339493.

It is an arithmetic number, because the mean of its divisors is an integer number (12217644).

Almost surely, 2^78057055 is an apocalyptic number.

78057055 is a deficient number, since it is larger than the sum of its proper divisors (19684097).

78057055 is a wasteful number, since it uses less digits than its factorization.

78057055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678785.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 78057055 is about 8834.9903791685. The cubic root of 78057055 is about 427.3700207879.

It can be divided in two parts, 780570 and 55, that added together give a triangular number (780625 = T₁₂₄₉).

The spelling of 78057055 in words is "seventy-eight million, fifty-seven thousand, fifty-five".