689402940 has 48 divisors (see below), whose sum is σ = 1931876352. Its totient is φ = 183693376.

The previous prime is 689402933. The next prime is 689402941. The reversal of 689402940 is 49204986.

689402940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 689402892 and 689402901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689402941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85357 + ... + 93083.

It is an arithmetic number, because the mean of its divisors is an integer number (40247424).

Almost surely, 2^689402940 is an apocalyptic number.

689402940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

689402940 is an abundant number, since it is smaller than the sum of its proper divisors (1242473412).

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

689402940 is a wasteful number, since it uses less digits than its factorization.

689402940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226 (or 9224 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 689402940 is about 26256.4837706803. The cubic root of 689402940 is about 883.4006416810.

The spelling of 689402940 in words is "six hundred eighty-nine million, four hundred two thousand, nine hundred forty".