78363878 has 8 divisors (see below), whose sum is σ = 117586560. Its totient is φ = 39168360.

The previous prime is 78363853. The next prime is 78363889. The reversal of 78363878 is 87836387.

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

It is a super-2 number, since 2×78363878² = 12281794750397768, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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, 3608 + ... + 13028.

It is an arithmetic number, because the mean of its divisors is an integer number (14698320).

Almost surely, 2^78363878 is an apocalyptic number.

78363878 is a deficient number, since it is larger than the sum of its proper divisors (39222682).

78363878 is a wasteful number, since it uses less digits than its factorization.

78363878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13582.

The product of its digits is 1354752, while the sum is 50.

The square root of 78363878 is about 8852.3374314358. The cubic root of 78363878 is about 427.9292506866.

The spelling of 78363878 in words is "seventy-eight million, three hundred sixty-three thousand, eight hundred seventy-eight".