77272238 has 8 divisors (see below), whose sum is σ = 117808680. Its totient is φ = 38002680.

The previous prime is 77272231. The next prime is 77272267. The reversal of 77272238 is 83227277.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77272231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316568 + ... + 316811.

It is an arithmetic number, because the mean of its divisors is an integer number (14726085).

Almost surely, 2^77272238 is an apocalyptic number.

77272238 is a deficient number, since it is larger than the sum of its proper divisors (40536442).

77272238 is a wasteful number, since it uses less digits than its factorization.

77272238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633442.

The product of its digits is 65856, while the sum is 38.

The square root of 77272238 is about 8790.4629002118. The cubic root of 77272238 is about 425.9328767849.

The spelling of 77272238 in words is "seventy-seven million, two hundred seventy-two thousand, two hundred thirty-eight".