77145340 has 12 divisors (see below), whose sum is σ = 162005256. Its totient is φ = 30858128.

The previous prime is 77145323. The next prime is 77145347. The reversal of 77145340 is 4354177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77145347) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1928614 + ... + 1928653.

It is an arithmetic number, because the mean of its divisors is an integer number (13500438).

Almost surely, 2^77145340 is an apocalyptic number.

It is an amenable number.

77145340 is an abundant number, since it is smaller than the sum of its proper divisors (84859916).

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

77145340 is a wasteful number, since it uses less digits than its factorization.

77145340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857276 (or 3857274 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 77145340 is about 8783.2419982601. The cubic root of 77145340 is about 425.6995905665.

The spelling of 77145340 in words is "seventy-seven million, one hundred forty-five thousand, three hundred forty".