1690148 has 6 divisors (see below), whose sum is σ = 2957766. Its totient is φ = 845072.

The previous prime is 1690121. The next prime is 1690153. The reversal of 1690148 is 8410961.

It can be written as a sum of positive squares in only one way, i.e., 1582564 + 107584 = 1258^2 + 328^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1690148.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211265 + ... + 211272.

It is an arithmetic number, because the mean of its divisors is an integer number (492961).

2^1690148 is an apocalyptic number.

It is an amenable number.

1690148 is a deficient number, since it is larger than the sum of its proper divisors (1267618).

1690148 is a wasteful number, since it uses less digits than its factorization.

1690148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422541 (or 422539 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1690148 is about 1300.0569218307. The cubic root of 1690148 is about 119.1173195086.

The spelling of 1690148 in words is "one million, six hundred ninety thousand, one hundred forty-eight".