77207380 has 12 divisors (see below), whose sum is σ = 162135540. Its totient is φ = 30882944.

The previous prime is 77207371. The next prime is 77207401. The reversal of 77207380 is 8370277.

It can be written as a sum of positive squares in 2 ways, for example, as 57244356 + 19963024 = 7566^2 + 4468^2 .

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, 1930165 + ... + 1930204.

It is an arithmetic number, because the mean of its divisors is an integer number (13511295).

Almost surely, 2^77207380 is an apocalyptic number.

It is an amenable number.

77207380 is an abundant number, since it is smaller than the sum of its proper divisors (84928160).

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

77207380 is a wasteful number, since it uses less digits than its factorization.

77207380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860378 (or 3860376 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 77207380 is about 8786.7730140251. The cubic root of 77207380 is about 425.8136753405.

The spelling of 77207380 in words is "seventy-seven million, two hundred seven thousand, three hundred eighty".