77331648 has 28 divisors (see below), whose sum is σ = 204607160. Its totient is φ = 25777152.

The previous prime is 77331643. The next prime is 77331689. The reversal of 77331648 is 84613377.

It is not an unprimeable number, because it can be changed into a prime (77331641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201193 + ... + 201576.

Almost surely, 2^77331648 is an apocalyptic number.

It is an amenable number.

77331648 is an abundant number, since it is smaller than the sum of its proper divisors (127275512).

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

77331648 is a wasteful number, since it uses less digits than its factorization.

77331648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402784 (or 402774 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 77331648 is about 8793.8414814005. The cubic root of 77331648 is about 426.0420069225.

The spelling of 77331648 in words is "seventy-seven million, three hundred thirty-one thousand, six hundred forty-eight".