1690000686 has 80 divisors (see below), whose sum is σ = 4141109808. Its totient is φ = 510883200.

The previous prime is 1690000621. The next prime is 1690000687. The reversal of 1690000686 is 6860000961.

It is a super-2 number, since 2×1690000686² = 5712204637360941192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1690000686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690000687) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 963186 + ... + 964938.

Almost surely, 2^1690000686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690000686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2070554904).

1690000686 is an abundant number, since it is smaller than the sum of its proper divisors (2451109122).

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

1690000686 is a wasteful number, since it uses less digits than its factorization.

1690000686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319 (or 2310 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1690000686 is about 41109.6179257361. The cubic root of 1690000686 is about 1191.1385863643.

The spelling of 1690000686 in words is "one billion, six hundred ninety million, six hundred eighty-six", and thus it is an aban number.