78474816 has 84 divisors (see below), whose sum is σ = 257080512. Its totient is φ = 22420224.

The previous prime is 78474811. The next prime is 78474901. The reversal of 78474816 is 61847487.

It is a tau number, because it is divible by the number of its divisors (84).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78474811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5700 + ... + 13763.

Almost surely, 2^78474816 is an apocalyptic number.

It is an amenable number.

78474816 is an abundant number, since it is smaller than the sum of its proper divisors (178605696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78474816 is a wasteful number, since it uses less digits than its factorization.

78474816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19488 (or 19475 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 78474816 is about 8858.6012439888. The cubic root of 78474816 is about 428.1310921114.

It can be divided in two parts, 7847481 and 6, that added together give a palindrome (7847487).

The spelling of 78474816 in words is "seventy-eight million, four hundred seventy-four thousand, eight hundred sixteen".