77225712 has 40 divisors (see below), whose sum is σ = 205939200. Its totient is φ = 24911040.

The previous prime is 77225689. The next prime is 77225719. The reversal of 77225712 is 21752277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77225719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24462 + ... + 27437.

It is an arithmetic number, because the mean of its divisors is an integer number (5148480).

Almost surely, 2^77225712 is an apocalyptic number.

It is an amenable number.

77225712 is an abundant number, since it is smaller than the sum of its proper divisors (128713488).

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

77225712 is a wasteful number, since it uses less digits than its factorization.

77225712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51941 (or 51935 counting only the distinct ones).

The product of its digits is 13720, while the sum is 33.

The square root of 77225712 is about 8787.8161109573. The cubic root of 77225712 is about 425.8473741854.

Adding to 77225712 its reverse (21752277), we get a palindrome (98977989).

The spelling of 77225712 in words is "seventy-seven million, two hundred twenty-five thousand, seven hundred twelve".