778484946 has 16 divisors (see below), whose sum is σ = 1573022304. Its totient is φ = 256819584.

The previous prime is 778484939. The next prime is 778484957. The reversal of 778484946 is 649484877.

It is a happy number.

It is a super-2 number, since 2×778484946² = 1212077622297245832, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668220 + ... + 669383.

It is an arithmetic number, because the mean of its divisors is an integer number (98313894).

Almost surely, 2^778484946 is an apocalyptic number.

778484946 is an abundant number, since it is smaller than the sum of its proper divisors (794537358).

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

778484946 is a wasteful number, since it uses less digits than its factorization.

778484946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337705.

The product of its digits is 10838016, while the sum is 57.

The square root of 778484946 is about 27901.3430859520. The cubic root of 778484946 is about 919.9200253417.

The spelling of 778484946 in words is "seven hundred seventy-eight million, four hundred eighty-four thousand, nine hundred forty-six".