689818690 has 64 divisors (see below), whose sum is σ = 1440270720. Its totient is φ = 235095040.

The previous prime is 689818637. The next prime is 689818711. The reversal of 689818690 is 96818986.

It is a super-2 number, since 2×689818690² = 951699650146632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

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 31 ways as a sum of consecutive naturals, for example, 547281 + ... + 548539.

It is an arithmetic number, because the mean of its divisors is an integer number (22504230).

Almost surely, 2^689818690 is an apocalyptic number.

689818690 is an abundant number, since it is smaller than the sum of its proper divisors (750452030).

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

689818690 is a wasteful number, since it uses less digits than its factorization.

689818690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 689818690 is about 26264.3996695146. The cubic root of 689818690 is about 883.5781866217.

The spelling of 689818690 in words is "six hundred eighty-nine million, eight hundred eighteen thousand, six hundred ninety".