1689426180 has 96 divisors (see below), whose sum is σ = 5660323200. Its totient is φ = 415857024.

The previous prime is 1689426169. The next prime is 1689426209. The reversal of 1689426180 is 816249861.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113310 + ... + 127349.

It is an arithmetic number, because the mean of its divisors is an integer number (58961700).

Almost surely, 2^1689426180 is an apocalyptic number.

1689426180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1689426180 is an abundant number, since it is smaller than the sum of its proper divisors (3970897020).

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

1689426180 is a wasteful number, since it uses less digits than its factorization.

1689426180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240690 (or 240682 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1689426180 is about 41102.6298428702. The cubic root of 1689426180 is about 1191.0035974994.

The spelling of 1689426180 in words is "one billion, six hundred eighty-nine million, four hundred twenty-six thousand, one hundred eighty".