689587980 has 24 divisors (see below), whose sum is σ = 1930846512. Its totient is φ = 183890112.

The previous prime is 689587939. The next prime is 689587991. The reversal of 689587980 is 89785986.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 11493133 = 689587980 / (6 + 8 + 9 + 5 + 8 + 7 + 9 + 8 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5746507 + ... + 5746626.

It is an arithmetic number, because the mean of its divisors is an integer number (80451938).

Almost surely, 2^689587980 is an apocalyptic number.

689587980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689587980 is an abundant number, since it is smaller than the sum of its proper divisors (1241258532).

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

689587980 is a wasteful number, since it uses less digits than its factorization.

689587980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11493145 (or 11493143 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 60.

The square root of 689587980 is about 26260.0072353379. The cubic root of 689587980 is about 883.4796713371.

The spelling of 689587980 in words is "six hundred eighty-nine million, five hundred eighty-seven thousand, nine hundred eighty".