779494978 has 8 divisors (see below), whose sum is σ = 1220079168. Its totient is φ = 372801924.

The previous prime is 779494967. The next prime is 779494987. The reversal of 779494978 is 879494977.

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

It is a super-2 number, since 2×779494978² = 1215224841454440968, which contains 22 as substring.

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, 8472726 + ... + 8472817.

It is an arithmetic number, because the mean of its divisors is an integer number (152509896).

Almost surely, 2^779494978 is an apocalyptic number.

779494978 is a deficient number, since it is larger than the sum of its proper divisors (440584190).

779494978 is a wasteful number, since it uses less digits than its factorization.

779494978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16945568.

The product of its digits is 32006016, while the sum is 64.

The square root of 779494978 is about 27919.4372794295. The cubic root of 779494978 is about 920.3176982495.

Subtracting 779494978 from its reverse (879494977), we obtain a palindrome (99999999).

The spelling of 779494978 in words is "seven hundred seventy-nine million, four hundred ninety-four thousand, nine hundred seventy-eight".