77834040 has 32 divisors (see below), whose sum is σ = 233502480. Its totient is φ = 20755712.

The previous prime is 77834027. The next prime is 77834063. The reversal of 77834040 is 4043877.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77833992 and 77834010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324189 + ... + 324428.

Almost surely, 2^77834040 is an apocalyptic number.

It is an amenable number.

77834040 is an abundant number, since it is smaller than the sum of its proper divisors (155668440).

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

77834040 is a wasteful number, since it uses less digits than its factorization.

77834040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648631 (or 648627 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 77834040 is about 8822.3602284196. The cubic root of 77834040 is about 426.9626228968.

The spelling of 77834040 in words is "seventy-seven million, eight hundred thirty-four thousand, forty".