1690038 has 64 divisors (see below), whose sum is σ = 4561920. Its totient is φ = 452736.

The previous prime is 1690019. The next prime is 1690043. The reversal of 1690038 is 8300961.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1689993 and 1690020.

It is a congruent number.

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, 6295 + ... + 6557.

It is an arithmetic number, because the mean of its divisors is an integer number (71280).

2^1690038 is an apocalyptic number.

1690038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2280960).

1690038 is an abundant number, since it is smaller than the sum of its proper divisors (2871882).

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

1690038 is a wasteful number, since it uses less digits than its factorization.

1690038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1690038 is about 1300.0146153025. The cubic root of 1690038 is about 119.1147352794.

Adding to 1690038 its reverse (8300961), we get a palindrome (9990999).

The spelling of 1690038 in words is "one million, six hundred ninety thousand, thirty-eight".