690049646 has 48 divisors (see below), whose sum is σ = 1262366208. Its totient is φ = 280144800.

The previous prime is 690049609. The next prime is 690049651. The reversal of 690049646 is 646940096.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 690049597 and 690049606.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 112265 + ... + 118251.

It is an arithmetic number, because the mean of its divisors is an integer number (26299296).

Almost surely, 2^690049646 is an apocalyptic number.

690049646 is a deficient number, since it is larger than the sum of its proper divisors (572316562).

690049646 is a wasteful number, since it uses less digits than its factorization.

690049646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6057 (or 6044 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 690049646 is about 26268.7960515894. The cubic root of 690049646 is about 883.6767849522.

The spelling of 690049646 in words is "six hundred ninety million, forty-nine thousand, six hundred forty-six".