772438 has 4 divisors (see below), whose sum is σ = 1158660. Its totient is φ = 386218.

The previous prime is 772403. The next prime is 772439. The reversal of 772438 is 834277.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772439) by changing a digit.

772438 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193108 + ... + 193111.

It is an arithmetic number, because the mean of its divisors is an integer number (289665).

2⁷⁷²⁴³⁸ is an apocalyptic number.

772438 is a deficient number, since it is larger than the sum of its proper divisors (386222).

772438 is a wasteful number, since it uses less digits than its factorization.

772438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386221.

The product of its digits is 9408, while the sum is 31.

The square root of 772438 is about 878.8845202869. The cubic root of 772438 is about 91.7531979968.

The spelling of 772438 in words is "seven hundred seventy-two thousand, four hundred thirty-eight".