77449768 has 32 divisors (see below), whose sum is σ = 158760000. Its totient is φ = 35128960.

The previous prime is 77449741. The next prime is 77449781. The reversal of 77449768 is 86794477.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73308 + ... + 74356.

It is an arithmetic number, because the mean of its divisors is an integer number (4961250).

Almost surely, 2^77449768 is an apocalyptic number.

It is an amenable number.

77449768 is an abundant number, since it is smaller than the sum of its proper divisors (81310232).

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

77449768 is a wasteful number, since it uses less digits than its factorization.

77449768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905 (or 1901 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 52.

The square root of 77449768 is about 8800.5549824997. The cubic root of 77449768 is about 426.2588154453.

The spelling of 77449768 in words is "seventy-seven million, four hundred forty-nine thousand, seven hundred sixty-eight".