78477714 has 128 divisors (see below), whose sum is σ = 215040000. Its totient is φ = 21146832.

The previous prime is 78477713. The next prime is 78477727. The reversal of 78477714 is 41777487.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78477714.

It is not an unprimeable number, because it can be changed into a prime (78477713) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 351807 + ... + 352029.

It is an arithmetic number, because the mean of its divisors is an integer number (1680000).

Almost surely, 2^78477714 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78477714, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107520000).

78477714 is an abundant number, since it is smaller than the sum of its proper divisors (136562286).

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

78477714 is a wasteful number, since it uses less digits than its factorization.

78477714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 254 counting only the distinct ones).

The product of its digits is 307328, while the sum is 45.

The square root of 78477714 is about 8858.7648123201. The cubic root of 78477714 is about 428.1363622040.

The spelling of 78477714 in words is "seventy-eight million, four hundred seventy-seven thousand, seven hundred fourteen".