1778130297 has 12 divisors (see below), whose sum is σ = 2610516324. Its totient is φ = 1165986720.

The previous prime is 1778130241. The next prime is 1778130301. The reversal of 1778130297 is 7920318771.

It can be written as a sum of positive squares in 2 ways, for example, as 38489616 + 1739640681 = 6204^2 + 41709^2 .

It is not a de Polignac number, because 1778130297 - 2¹⁴ = 1778113913 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1778130217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1618878 + ... + 1619975.

It is an arithmetic number, because the mean of its divisors is an integer number (217543027).

Almost surely, 2^1778130297 is an apocalyptic number.

It is an amenable number.

1778130297 is a deficient number, since it is larger than the sum of its proper divisors (832386027).

1778130297 is a wasteful number, since it uses less digits than its factorization.

1778130297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238920 (or 3238917 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 1778130297 is about 42167.8822920952. The cubic root of 1778130297 is about 1211.4937945051.

The spelling of 1778130297 in words is "one billion, seven hundred seventy-eight million, one hundred thirty thousand, two hundred ninety-seven".