77981334 has 32 divisors (see below), whose sum is σ = 157977600. Its totient is φ = 25660800.

The previous prime is 77981333. The next prime is 77981353. The reversal of 77981334 is 43318977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77981333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287619 + ... + 287889.

It is an arithmetic number, because the mean of its divisors is an integer number (4936800).

Almost surely, 2^77981334 is an apocalyptic number.

77981334 is an abundant number, since it is smaller than the sum of its proper divisors (79996266).

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

77981334 is a wasteful number, since it uses less digits than its factorization.

77981334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its digits is 127008, while the sum is 42.

The square root of 77981334 is about 8830.7040489420. The cubic root of 77981334 is about 427.2317827810.

The spelling of 77981334 in words is "seventy-seven million, nine hundred eighty-one thousand, three hundred thirty-four".