78488855 has 4 divisors (see below), whose sum is σ = 94186632. Its totient is φ = 62791080.

The previous prime is 78488827. The next prime is 78488863. The reversal of 78488855 is 55888487.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78488855 - 2¹⁰ = 78487831 is a prime.

It is a super-2 number, since 2×78488855² = 12321000718422050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78488797 and 78488806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7848881 + ... + 7848890.

It is an arithmetic number, because the mean of its divisors is an integer number (23546658).

Almost surely, 2^78488855 is an apocalyptic number.

78488855 is a deficient number, since it is larger than the sum of its proper divisors (15697777).

78488855 is a wasteful number, since it uses less digits than its factorization.

78488855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15697776.

The product of its digits is 2867200, while the sum is 53.

The square root of 78488855 is about 8859.3936022732. The cubic root of 78488855 is about 428.1566212103.

The spelling of 78488855 in words is "seventy-eight million, four hundred eighty-eight thousand, eight hundred fifty-five".