1690056 has 24 divisors (see below), whose sum is σ = 4577430. Its totient is φ = 563328.

The previous prime is 1690043. The next prime is 1690057. The reversal of 1690056 is 6500961.

It can be written as a sum of positive squares in only one way, i.e., 933156 + 756900 = 966^2 + 870^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1690057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11665 + ... + 11808.

2^1690056 is an apocalyptic number.

It is an amenable number.

1690056 is an abundant number, since it is smaller than the sum of its proper divisors (2887374).

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

1690056 is a wasteful number, since it uses less digits than its factorization.

1690056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23485 (or 23478 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1690056 is about 1300.0215382831. The cubic root of 1690056 is about 119.1151581610.

The spelling of 1690056 in words is "one million, six hundred ninety thousand, fifty-six".