690843398394 has 8 divisors (see below), whose sum is σ = 1381686796800. Its totient is φ = 230281132796.

The previous prime is 690843398389. The next prime is 690843398423. The reversal of 690843398394 is 493893348096.

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

690843398394 is an admirable number.

It is a super-2 number, since 2×690843398394² (a number of 24 digits) 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, 57570283194 + ... + 57570283205.

It is an arithmetic number, because the mean of its divisors is an integer number (172710849600).

Almost surely, 2^690843398394 is an apocalyptic number.

690843398394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

690843398394 is a wasteful number, since it uses less digits than its factorization.

690843398394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115140566404.

The product of its (nonzero) digits is 120932352, while the sum is 66.

The spelling of 690843398394 in words is "six hundred ninety billion, eight hundred forty-three million, three hundred ninety-eight thousand, three hundred ninety-four".