77345238 has 32 divisors (see below), whose sum is σ = 163238400. Its totient is φ = 24363936.

The previous prime is 77345231. The next prime is 77345239. The reversal of 77345238 is 83254377.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77345196 and 77345205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77345231) 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 15 ways as a sum of consecutive naturals, for example, 73923 + ... + 74961.

It is an arithmetic number, because the mean of its divisors is an integer number (5101200).

Almost surely, 2^77345238 is an apocalyptic number.

77345238 is an abundant number, since it is smaller than the sum of its proper divisors (85893162).

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

77345238 is a wasteful number, since it uses less digits than its factorization.

77345238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its digits is 141120, while the sum is 39.

The square root of 77345238 is about 8794.6141473063. The cubic root of 77345238 is about 426.0669625169.

The spelling of 77345238 in words is "seventy-seven million, three hundred forty-five thousand, two hundred thirty-eight".