690249168 has 80 divisors (see below), whose sum is σ = 2264319360. Its totient is φ = 197213184.

The previous prime is 690249167. The next prime is 690249173. The reversal of 690249168 is 861942096.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690249163) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 111105 + ... + 117152.

It is an arithmetic number, because the mean of its divisors is an integer number (28303992).

Almost surely, 2^690249168 is an apocalyptic number.

It is an amenable number.

690249168 is an abundant number, since it is smaller than the sum of its proper divisors (1574070192).

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

690249168 is a wasteful number, since it uses less digits than its factorization.

690249168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228281 (or 228269 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 690249168 is about 26272.5934768534. The cubic root of 690249168 is about 883.7619459596.

The spelling of 690249168 in words is "six hundred ninety million, two hundred forty-nine thousand, one hundred sixty-eight".