777242420 has 12 divisors (see below), whose sum is σ = 1632209124. Its totient is φ = 310896960.

The previous prime is 777242407. The next prime is 777242423. The reversal of 777242420 is 24242777.

It can be written as a sum of positive squares in 2 ways, for example, as 286354084 + 490888336 = 16922^2 + 22156^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777242423) 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, 19431041 + ... + 19431080.

It is an arithmetic number, because the mean of its divisors is an integer number (136017427).

Almost surely, 2^777242420 is an apocalyptic number.

It is an amenable number.

777242420 is an abundant number, since it is smaller than the sum of its proper divisors (854966704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

777242420 is a wasteful number, since it uses less digits than its factorization.

777242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38862130 (or 38862128 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 35.

The square root of 777242420 is about 27879.0677749454. The cubic root of 777242420 is about 919.4303420513.

The spelling of 777242420 in words is "seven hundred seventy-seven million, two hundred forty-two thousand, four hundred twenty".