1663090 has 32 divisors (see below), whose sum is σ = 3519936. Its totient is φ = 557760.

The previous prime is 1663073. The next prime is 1663091. The reversal of 1663090 is 903661.

It is not an unprimeable number, because it can be changed into a prime (1663091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849 + ... + 2011.

It is an arithmetic number, because the mean of its divisors is an integer number (109998).

2^1663090 is an apocalyptic number.

1663090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663090 is an abundant number, since it is smaller than the sum of its proper divisors (1856846).

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

1663090 is a wasteful number, since it uses less digits than its factorization.

1663090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1663090 is about 1289.6084677141. The cubic root of 1663090 is about 118.4782372635.

The spelling of 1663090 in words is "one million, six hundred sixty-three thousand, ninety".