77345138 has 16 divisors (see below), whose sum is σ = 132292440. Its totient is φ = 33597696.

The previous prime is 77345137. The next prime is 77345141. The reversal of 77345138 is 83154377.

It can be written as a sum of positive squares in 4 ways, for example, as 72709729 + 4635409 = 8527^2 + 2153^2 .

It is not an unprimeable number, because it can be changed into a prime (77345137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87053 + ... + 87936.

Almost surely, 2^77345138 is an apocalyptic number.

77345138 is a deficient number, since it is larger than the sum of its proper divisors (54947302).

77345138 is a wasteful number, since it uses less digits than its factorization.

77345138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175021.

The product of its digits is 70560, while the sum is 38.

The square root of 77345138 is about 8794.6084620067. The cubic root of 77345138 is about 426.0667788956.

The spelling of 77345138 in words is "seventy-seven million, three hundred forty-five thousand, one hundred thirty-eight".