690352408 has 16 divisors (see below), whose sum is σ = 1299571560. Its totient is φ = 343800000.

The previous prime is 690352387. The next prime is 690352447. The reversal of 690352408 is 804253096.

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 3 ways as a sum of consecutive naturals, for example, 169893 + ... + 173908.

Almost surely, 2^690352408 is an apocalyptic number.

It is an amenable number.

690352408 is a deficient number, since it is larger than the sum of its proper divisors (609219152).

690352408 is a wasteful number, since it uses less digits than its factorization.

690352408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344058 (or 344054 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 690352408 is about 26274.5581884834. The cubic root of 690352408 is about 883.8060049453.

The spelling of 690352408 in words is "six hundred ninety million, three hundred fifty-two thousand, four hundred eight".