1689428946 has 16 divisors (see below), whose sum is σ = 3382545600. Its totient is φ = 562528368.

The previous prime is 1689428893. The next prime is 1689428957. The reversal of 1689428946 is 6498249861.

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, 147681 + ... + 158708.

It is an arithmetic number, because the mean of its divisors is an integer number (211409100).

Almost surely, 2^1689428946 is an apocalyptic number.

1689428946 is an abundant number, since it is smaller than the sum of its proper divisors (1693116654).

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

1689428946 is a wasteful number, since it uses less digits than its factorization.

1689428946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307313.

The product of its digits is 5971968, while the sum is 57.

The square root of 1689428946 is about 41102.6634903384. The cubic root of 1689428946 is about 1191.0042474862.

The spelling of 1689428946 in words is "one billion, six hundred eighty-nine million, four hundred twenty-eight thousand, nine hundred forty-six".