77238293 has 12 divisors (see below), whose sum is σ = 89894700. Its totient is φ = 66084480.

The previous prime is 77238289. The next prime is 77238313. The reversal of 77238293 is 39283277.

It can be written as a sum of positive squares in 2 ways, for example, as 41692849 + 35545444 = 6457^2 + 5962^2 .

It is not a de Polignac number, because 77238293 - 2² = 77238289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77238293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77238233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16718 + ... + 20831.

It is an arithmetic number, because the mean of its divisors is an integer number (7491225).

Almost surely, 2^77238293 is an apocalyptic number.

It is an amenable number.

77238293 is a deficient number, since it is larger than the sum of its proper divisors (12656407).

77238293 is a wasteful number, since it uses less digits than its factorization.

77238293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37588 (or 37577 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 77238293 is about 8788.5319024283. The cubic root of 77238293 is about 425.8704981544.

The spelling of 77238293 in words is "seventy-seven million, two hundred thirty-eight thousand, two hundred ninety-three".