77270320 has 40 divisors (see below), whose sum is σ = 180341136. Its totient is φ = 30789888.

The previous prime is 77270311. The next prime is 77270327. The reversal of 77270320 is 2307277.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (77270327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20934 + ... + 24346.

Almost surely, 2^77270320 is an apocalyptic number.

It is an amenable number.

77270320 is an abundant number, since it is smaller than the sum of its proper divisors (103070816).

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

77270320 is a wasteful number, since it uses less digits than its factorization.

77270320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709 (or 3703 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 77270320 is about 8790.3538040286. The cubic root of 77270320 is about 425.9293526817.

Adding to 77270320 its reverse (2307277), we get a palindrome (79577597).

The spelling of 77270320 in words is "seventy-seven million, two hundred seventy thousand, three hundred twenty".