78396895 has 16 divisors (see below), whose sum is σ = 98216928. Its totient is φ = 60013440.

The previous prime is 78396883. The next prime is 78396919. The reversal of 78396895 is 59869387.

It is a happy number.

It is not a de Polignac number, because 78396895 - 2¹³ = 78388703 is a prime.

It is a super-2 number, since 2×78396895² = 12292146291282050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 7812 + ... + 14758.

It is an arithmetic number, because the mean of its divisors is an integer number (6138558).

Almost surely, 2^78396895 is an apocalyptic number.

78396895 is a deficient number, since it is larger than the sum of its proper divisors (19820033).

78396895 is a wasteful number, since it uses less digits than its factorization.

78396895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7050.

The product of its digits is 3265920, while the sum is 55.

The square root of 78396895 is about 8854.2021097330. The cubic root of 78396895 is about 427.9893419624.

The spelling of 78396895 in words is "seventy-eight million, three hundred ninety-six thousand, eight hundred ninety-five".