77161238 has 32 divisors (see below), whose sum is σ = 146354688. Its totient is φ = 29635200.

The previous prime is 77161237. The next prime is 77161241. The reversal of 77161238 is 83216177.

It is a junction number, because it is equal to n+sod(n) for n = 77161198 and 77161207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77161237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7406 + ... + 14462.

It is an arithmetic number, because the mean of its divisors is an integer number (4573584).

Almost surely, 2^77161238 is an apocalyptic number.

77161238 is a deficient number, since it is larger than the sum of its proper divisors (69193450).

77161238 is a wasteful number, since it uses less digits than its factorization.

77161238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7148.

The product of its digits is 14112, while the sum is 35.

The square root of 77161238 is about 8784.1469705373. The cubic root of 77161238 is about 425.7288310765.

The spelling of 77161238 in words is "seventy-seven million, one hundred sixty-one thousand, two hundred thirty-eight".