77640334 has 8 divisors (see below), whose sum is σ = 118938528. Its totient is φ = 37994160.

The previous prime is 77640317. The next prime is 77640361. The reversal of 77640334 is 43304677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 77640334.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412887 + ... + 413074.

It is an arithmetic number, because the mean of its divisors is an integer number (14867316).

Almost surely, 2^77640334 is an apocalyptic number.

77640334 is a deficient number, since it is larger than the sum of its proper divisors (41298194).

77640334 is a wasteful number, since it uses less digits than its factorization.

77640334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826010.

The product of its (nonzero) digits is 42336, while the sum is 34.

The square root of 77640334 is about 8811.3752615582. The cubic root of 77640334 is about 426.6081339247.

The spelling of 77640334 in words is "seventy-seven million, six hundred forty thousand, three hundred thirty-four".