770240257 has 4 divisors (see below), whose sum is σ = 770807556. Its totient is φ = 769672960.

The previous prime is 770240213. The next prime is 770240269. The reversal of 770240257 is 752042077.

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

It can be written as a sum of positive squares in 2 ways, for example, as 501804801 + 268435456 = 22401^2 + 16384^2 .

It is a cyclic number.

It is not a de Polignac number, because 770240257 - 2²⁷ = 636022529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770240287) 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, 281608 + ... + 284329.

It is an arithmetic number, because the mean of its divisors is an integer number (192701889).

Almost surely, 2^770240257 is an apocalyptic number.

It is an amenable number.

770240257 is a deficient number, since it is larger than the sum of its proper divisors (567299).

770240257 is a wasteful number, since it uses less digits than its factorization.

770240257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567298.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 770240257 is about 27753.2026440193. The cubic root of 770240257 is about 916.6609650922.

The spelling of 770240257 in words is "seven hundred seventy million, two hundred forty thousand, two hundred fifty-seven".