78144077 has 8 divisors (see below), whose sum is σ = 85372320. Its totient is φ = 70936560.

The previous prime is 78144071. The next prime is 78144083. The reversal of 78144077 is 77044187.

It is an interprime number because it is at equal distance from previous prime (78144071) and next prime (78144083).

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 78144077 - 2¹⁰ = 78143053 is a prime.

It is a super-2 number, since 2×78144077² = 12212993540363858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78144077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78144071) by changing a digit.

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, 3323 + ... + 12935.

It is an arithmetic number, because the mean of its divisors is an integer number (10671540).

Almost surely, 2^78144077 is an apocalyptic number.

It is an amenable number.

78144077 is a deficient number, since it is larger than the sum of its proper divisors (7228243).

78144077 is a wasteful number, since it uses less digits than its factorization.

78144077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10363.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 78144077 is about 8839.9138570463. The cubic root of 78144077 is about 427.5287797959.

The spelling of 78144077 in words is "seventy-eight million, one hundred forty-four thousand, seventy-seven".