780513978 has 8 divisors (see below), whose sum is σ = 1561027968. Its totient is φ = 260171324.

The previous prime is 780513967. The next prime is 780513997. The reversal of 780513978 is 879315087.

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

780513978 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65042826 + ... + 65042837.

It is an arithmetic number, because the mean of its divisors is an integer number (195128496).

Almost surely, 2^780513978 is an apocalyptic number.

780513978 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.

780513978 is a wasteful number, since it uses less digits than its factorization.

780513978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130085668.

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

The square root of 780513978 is about 27937.6802544521. The cubic root of 780513978 is about 920.7185541059.

The spelling of 780513978 in words is "seven hundred eighty million, five hundred thirteen thousand, nine hundred seventy-eight".