77260720 has 20 divisors (see below), whose sum is σ = 179631360. Its totient is φ = 30904256.

The previous prime is 77260717. The next prime is 77260747. The reversal of 77260720 is 2706277.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482800 + ... + 482959.

It is an arithmetic number, because the mean of its divisors is an integer number (8981568).

Almost surely, 2^77260720 is an apocalyptic number.

It is an amenable number.

77260720 is an abundant number, since it is smaller than the sum of its proper divisors (102370640).

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

77260720 is a wasteful number, since it uses less digits than its factorization.

77260720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965772 (or 965766 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 77260720 is about 8789.8077339610. The cubic root of 77260720 is about 425.9117129155.

Adding to 77260720 its reverse (2706277), we get a palindrome (79966997).

The spelling of 77260720 in words is "seventy-seven million, two hundred sixty thousand, seven hundred twenty".