7382780978 has 16 divisors (see below), whose sum is σ = 11886221880. Its totient is φ = 3426656256.

The previous prime is 7382780963. The next prime is 7382780981. The reversal of 7382780978 is 8790872837.

It can be written as a sum of positive squares in 4 ways, for example, as 7297088929 + 85692049 = 85423^2 + 9257^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484783 + ... + 1489746.

Almost surely, 2^7382780978 is an apocalyptic number.

7382780978 is a deficient number, since it is larger than the sum of its proper divisors (4503440902).

7382780978 is a wasteful number, since it uses less digits than its factorization.

7382780978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974621.

The product of its (nonzero) digits is 9483264, while the sum is 59.

The square root of 7382780978 is about 85923.1108491772. The cubic root of 7382780978 is about 1947.1825169259.

The spelling of 7382780978 in words is "seven billion, three hundred eighty-two million, seven hundred eighty thousand, nine hundred seventy-eight".