1689898840 has 32 divisors (see below), whose sum is σ = 4345454880. Its totient is φ = 579393792.

The previous prime is 1689898813. The next prime is 1689898853. The reversal of 1689898840 is 488989861.

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 7 ways as a sum of consecutive naturals, for example, 3017397 + ... + 3017956.

It is an arithmetic number, because the mean of its divisors is an integer number (135795465).

Almost surely, 2^1689898840 is an apocalyptic number.

1689898840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689898840 is an abundant number, since it is smaller than the sum of its proper divisors (2655556040).

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

1689898840 is a wasteful number, since it uses less digits than its factorization.

1689898840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035371 (or 6035367 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 61.

The square root of 1689898840 is about 41108.3791945146. The cubic root of 1689898840 is about 1191.1146583390.

The spelling of 1689898840 in words is "one billion, six hundred eighty-nine million, eight hundred ninety-eight thousand, eight hundred forty".