690784492 has 12 divisors (see below), whose sum is σ = 1212762096. Its totient is φ = 344281040.

The previous prime is 690784459. The next prime is 690784513. The reversal of 690784492 is 294487096.

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 3 ways as a sum of consecutive naturals, for example, 276403 + ... + 278890.

It is an arithmetic number, because the mean of its divisors is an integer number (101063508).

Almost surely, 2^690784492 is an apocalyptic number.

It is an amenable number.

690784492 is a deficient number, since it is larger than the sum of its proper divisors (521977604).

690784492 is a wasteful number, since it uses less digits than its factorization.

690784492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555608 (or 555606 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 690784492 is about 26282.7793811842. The cubic root of 690784492 is about 883.9903546514.

The spelling of 690784492 in words is "six hundred ninety million, seven hundred eighty-four thousand, four hundred ninety-two".