1690140 has 48 divisors (see below), whose sum is σ = 5013792. Its totient is φ = 423936.

The previous prime is 1690121. The next prime is 1690153. The reversal of 1690140 is 410961.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (104454).

2^1690140 is an apocalyptic number.

1690140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2506896).

1690140 is an abundant number, since it is smaller than the sum of its proper divisors (3323652).

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

1690140 is a wasteful number, since it uses less digits than its factorization.

1690140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1690140 is about 1300.0538450387. The cubic root of 1690140 is about 119.1171315685.

It can be divided in two parts, 1690 and 140, that added together give a triangular number (1830 = T₆₀).

The spelling of 1690140 in words is "one million, six hundred ninety thousand, one hundred forty".