772138 has 8 divisors (see below), whose sum is σ = 1177380. Its totient is φ = 379680.

The previous prime is 772127. The next prime is 772139. The reversal of 772138 is 831277.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 751689 + 20449 = 867^2 + 143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (772139) by changing a digit.

772138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3043 + ... + 3286.

2⁷⁷²¹³⁸ is an apocalyptic number.

772138 is a deficient number, since it is larger than the sum of its proper divisors (405242).

772138 is a wasteful number, since it uses less digits than its factorization.

772138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6392.

The product of its digits is 2352, while the sum is 28.

The square root of 772138 is about 878.7138328261. The cubic root of 772138 is about 91.7413180687.

The spelling of 772138 in words is "seven hundred seventy-two thousand, one hundred thirty-eight".