1689901470 has 48 divisors (see below), whose sum is σ = 4459338000. Its totient is φ = 443912832.

The previous prime is 1689901463. The next prime is 1689901489. The reversal of 1689901470 is 741099861.

It is a happy number.

1689901470 is a `hidden beast` number, since 16 + 89 + 90 + 1 + 470 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134095 + ... + 146154.

It is an arithmetic number, because the mean of its divisors is an integer number (92902875).

Almost surely, 2^1689901470 is an apocalyptic number.

1689901470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1689901470 is an abundant number, since it is smaller than the sum of its proper divisors (2769436530).

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

1689901470 is a wasteful number, since it uses less digits than its factorization.

1689901470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280329 (or 280326 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 1689901470 is about 41108.4111831143. The cubic root of 1689901470 is about 1191.1152762517.

The spelling of 1689901470 in words is "one billion, six hundred eighty-nine million, nine hundred one thousand, four hundred seventy".