1690144 has 12 divisors (see below), whose sum is σ = 3327534. Its totient is φ = 845056.

The previous prime is 1690121. The next prime is 1690153. The reversal of 1690144 is 4410961.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 144 = 1300^2 + 12^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26377 + ... + 26440.

2^1690144 is an apocalyptic number.

It is an amenable number.

1690144 is a deficient number, since it is larger than the sum of its proper divisors (1637390).

1690144 is an equidigital number, since it uses as much as digits as its factorization.

1690144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52827 (or 52819 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1690144 is about 1300.0553834356. The cubic root of 1690144 is about 119.1172255386.

The spelling of 1690144 in words is "one million, six hundred ninety thousand, one hundred forty-four".