690875646 has 8 divisors (see below), whose sum is σ = 1381751304. Its totient is φ = 230291880.

The previous prime is 690875639. The next prime is 690875683. The reversal of 690875646 is 646578096.

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

690875646 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57572965 + ... + 57572976.

It is an arithmetic number, because the mean of its divisors is an integer number (172718913).

Almost surely, 2^690875646 is an apocalyptic number.

690875646 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.

690875646 is a wasteful number, since it uses less digits than its factorization.

690875646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115145946.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The square root of 690875646 is about 26284.5134252091. The cubic root of 690875646 is about 884.0292359106.

The spelling of 690875646 in words is "six hundred ninety million, eight hundred seventy-five thousand, six hundred forty-six".