689620740 has 24 divisors (see below), whose sum is σ = 1930938240. Its totient is φ = 183898848.

The previous prime is 689620739. The next prime is 689620781. The reversal of 689620740 is 47026986.

It is a junction number, because it is equal to n+sod(n) for n = 689620692 and 689620701.

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, 5746780 + ... + 5746899.

It is an arithmetic number, because the mean of its divisors is an integer number (80455760).

Almost surely, 2^689620740 is an apocalyptic number.

689620740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689620740 is an abundant number, since it is smaller than the sum of its proper divisors (1241317500).

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

689620740 is a wasteful number, since it uses less digits than its factorization.

689620740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11493691 (or 11493689 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 689620740 is about 26260.6309901343. The cubic root of 689620740 is about 883.4936614958.

The spelling of 689620740 in words is "six hundred eighty-nine million, six hundred twenty thousand, seven hundred forty".