689471980 has 24 divisors (see below), whose sum is σ = 1453959360. Its totient is φ = 274632960.

The previous prime is 689471977. The next prime is 689472001. The reversal of 689471980 is 89174986.

It is a happy number.

It is a super-2 number, since 2×689471980² = 950743222410240800, which contains 22 as substring.

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, 67341 + ... + 76900.

It is an arithmetic number, because the mean of its divisors is an integer number (60581640).

Almost surely, 2^689471980 is an apocalyptic number.

It is an amenable number.

689471980 is an abundant number, since it is smaller than the sum of its proper divisors (764487380).

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

689471980 is a wasteful number, since it uses less digits than its factorization.

689471980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144489 (or 144487 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 689471980 is about 26257.7984606478. The cubic root of 689471980 is about 883.4301299724.

The spelling of 689471980 in words is "six hundred eighty-nine million, four hundred seventy-one thousand, nine hundred eighty".