77798130 has 16 divisors (see below), whose sum is σ = 186715584. Its totient is φ = 20746160.

The previous prime is 77798111. The next prime is 77798131. The reversal of 77798130 is 3189777.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77798131) 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 7 ways as a sum of consecutive naturals, for example, 1296606 + ... + 1296665.

It is an arithmetic number, because the mean of its divisors is an integer number (11669724).

Almost surely, 2^77798130 is an apocalyptic number.

77798130 is an abundant number, since it is smaller than the sum of its proper divisors (108917454).

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

77798130 is a wasteful number, since it uses less digits than its factorization.

77798130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593281.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 77798130 is about 8820.3248239506. The cubic root of 77798130 is about 426.8969507465.

The spelling of 77798130 in words is "seventy-seven million, seven hundred ninety-eight thousand, one hundred thirty".