690238322778 has 32 divisors (see below), whose sum is σ = 1404902143872. Its totient is φ = 226031590400.

The previous prime is 690238322759. The next prime is 690238322783. The reversal of 690238322778 is 877223832096.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2763351 + ... + 3002762.

It is an arithmetic number, because the mean of its divisors is an integer number (43903191996).

Almost surely, 2^690238322778 is an apocalyptic number.

690238322778 is an abundant number, since it is smaller than the sum of its proper divisors (714663821094).

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

690238322778 is a wasteful number, since it uses less digits than its factorization.

690238322778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5766470.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 690238322778 in words is "six hundred ninety billion, two hundred thirty-eight million, three hundred twenty-two thousand, seven hundred seventy-eight".