513980778 has 8 divisors (see below), whose sum is σ = 1027961568. Its totient is φ = 171326924.

The previous prime is 513980773. The next prime is 513980821. The reversal of 513980778 is 877089315.

It is a sphenic number, since it is the product of 3 distinct primes.

513980778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (513980773) 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, 42831726 + ... + 42831737.

It is an arithmetic number, because the mean of its divisors is an integer number (128495196).

Almost surely, 2^513980778 is an apocalyptic number.

513980778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

513980778 is a wasteful number, since it uses less digits than its factorization.

513980778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85663468.

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 513980778 is about 22671.1441705089. The cubic root of 513980778 is about 801.0303276698.

The spelling of 513980778 in words is "five hundred thirteen million, nine hundred eighty thousand, seven hundred seventy-eight".