7778407982 has 32 divisors (see below), whose sum is σ = 12035568384. Its totient is φ = 3768811200.

The previous prime is 7778407961. The next prime is 7778407993. The reversal of 7778407982 is 2897048777.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3430013 + ... + 3432279.

It is an arithmetic number, because the mean of its divisors is an integer number (376111512).

Almost surely, 2^7778407982 is an apocalyptic number.

7778407982 is a deficient number, since it is larger than the sum of its proper divisors (4257160402).

7778407982 is a wasteful number, since it uses less digits than its factorization.

7778407982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744.

The product of its (nonzero) digits is 11063808, while the sum is 59.

The square root of 7778407982 is about 88195.2832185486. The cubic root of 7778407982 is about 1981.3608287812.

The spelling of 7778407982 in words is "seven billion, seven hundred seventy-eight million, four hundred seven thousand, nine hundred eighty-two".