1690004 has 24 divisors (see below), whose sum is σ = 3243240. Its totient is φ = 766976.

The previous prime is 1689967. The next prime is 1690009. The reversal of 1690004 is 4000961.

1690004 = T₁₅₂ + T₁₅₃ + ... + T₂₃₈.

It can be written as a sum of positive squares in 4 ways, for example, as 883600 + 806404 = 940^2 + 898^2 .

It is a super-2 number, since 2×1690004² = 5712227040032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690009) 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, 1544 + ... + 2400.

It is an arithmetic number, because the mean of its divisors is an integer number (135135).

2^1690004 is an apocalyptic number.

It is an amenable number.

1690004 is a deficient number, since it is larger than the sum of its proper divisors (1553236).

1690004 is a wasteful number, since it uses less digits than its factorization.

1690004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1690004 is about 1300.0015384606. The cubic root of 1690004 is about 119.1139364950.

Adding to 1690004 its reverse (4000961), we get a palindrome (5690965).

The spelling of 1690004 in words is "one million, six hundred ninety thousand, four".