77047212 has 48 divisors (see below), whose sum is σ = 198906624. Its totient is φ = 23016000.

The previous prime is 77047207. The next prime is 77047219. The reversal of 77047212 is 21274077.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77047212.

It is not an unprimeable number, because it can be changed into a prime (77047219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5262 + ... + 13482.

It is an arithmetic number, because the mean of its divisors is an integer number (4143888).

Almost surely, 2^77047212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77047212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99453312).

77047212 is an abundant number, since it is smaller than the sum of its proper divisors (121859412).

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

77047212 is a wasteful number, since it uses less digits than its factorization.

77047212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8310 (or 8308 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 77047212 is about 8777.6541285243. The cubic root of 77047212 is about 425.5190189616.

The spelling of 77047212 in words is "seventy-seven million, forty-seven thousand, two hundred twelve".