82278757 has 4 divisors (see below), whose sum is σ = 89758656. Its totient is φ = 74798860.

The previous prime is 82278733. The next prime is 82278821. The reversal of 82278757 is 75787228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82278757 - 2²³ = 73890149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82278727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3739933 + ... + 3739954.

It is an arithmetic number, because the mean of its divisors is an integer number (22439664).

Almost surely, 2^82278757 is an apocalyptic number.

It is an amenable number.

82278757 is a deficient number, since it is larger than the sum of its proper divisors (7479899).

82278757 is a wasteful number, since it uses less digits than its factorization.

82278757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7479898.

The product of its digits is 439040, while the sum is 46.

The square root of 82278757 is about 9070.7638597860. The cubic root of 82278757 is about 434.9398904039.

The spelling of 82278757 in words is "eighty-two million, two hundred seventy-eight thousand, seven hundred fifty-seven".