77364648 has 24 divisors (see below), whose sum is σ = 209529450. Its totient is φ = 25788192.

The previous prime is 77364647. The next prime is 77364689. The reversal of 77364648 is 84646377.

It can be written as a sum of positive squares in only one way, i.e., 77053284 + 311364 = 8778^2 + 558^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (77364647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 537183 + ... + 537326.

Almost surely, 2^77364648 is an apocalyptic number.

It is an amenable number.

77364648 is an abundant number, since it is smaller than the sum of its proper divisors (132164802).

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

77364648 is a wasteful number, since it uses less digits than its factorization.

77364648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074521 (or 1074514 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 77364648 is about 8795.7175943751. The cubic root of 77364648 is about 426.1026004276.

The spelling of 77364648 in words is "seventy-seven million, three hundred sixty-four thousand, six hundred forty-eight".