78471838 has 8 divisors (see below), whose sum is σ = 117760032. Its totient is φ = 39218496.

The previous prime is 78471821. The next prime is 78471839. The reversal of 78471838 is 83817487.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78471839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070 + ... + 12697.

It is an arithmetic number, because the mean of its divisors is an integer number (14720004).

Almost surely, 2^78471838 is an apocalyptic number.

78471838 is a deficient number, since it is larger than the sum of its proper divisors (39288194).

78471838 is a wasteful number, since it uses less digits than its factorization.

78471838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17426.

The product of its digits is 301056, while the sum is 46.

The square root of 78471838 is about 8858.4331571672. The cubic root of 78471838 is about 428.1256764015.

The spelling of 78471838 in words is "seventy-eight million, four hundred seventy-one thousand, eight hundred thirty-eight".