1690687060 has 24 divisors (see below), whose sum is σ = 3759293160. Its totient is φ = 636493824.

The previous prime is 1690687007. The next prime is 1690687069. The reversal of 1690687060 is 607860961.

It can be written as a sum of positive squares in 4 ways, for example, as 592825104 + 1097861956 = 24348^2 + 33134^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1690686998 and 1690687016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690687069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2485965 + ... + 2486644.

It is an arithmetic number, because the mean of its divisors is an integer number (156637215).

Almost surely, 2^1690687060 is an apocalyptic number.

1690687060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1690687060 is an abundant number, since it is smaller than the sum of its proper divisors (2068606100).

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

1690687060 is a wasteful number, since it uses less digits than its factorization.

1690687060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4972635 (or 4972633 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1690687060 is about 41117.9651733886. The cubic root of 1690687060 is about 1191.2998202040.

The spelling of 1690687060 in words is "one billion, six hundred ninety million, six hundred eighty-seven thousand, sixty".