1688045950 has 12 divisors (see below), whose sum is σ = 3139765560. Its totient is φ = 675218360.

The previous prime is 1688045929. The next prime is 1688045971. The reversal of 1688045950 is 595408861.

It is an interprime number because it is at equal distance from previous prime (1688045929) and next prime (1688045971).

It is a super-2 number, since 2×1688045950² = 5698998258622805000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1688045950.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16880410 + ... + 16880509.

It is an arithmetic number, because the mean of its divisors is an integer number (261647130).

Almost surely, 2^1688045950 is an apocalyptic number.

1688045950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1688045950 is a deficient number, since it is larger than the sum of its proper divisors (1451719610).

1688045950 is a wasteful number, since it uses less digits than its factorization.

1688045950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33760931 (or 33760926 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 1688045950 is about 41085.8363672933. The cubic root of 1688045950 is about 1190.6791664814.

The spelling of 1688045950 in words is "one billion, six hundred eighty-eight million, forty-five thousand, nine hundred fifty".