1663038 has 64 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 484704.

The previous prime is 1663031. The next prime is 1663073. The reversal of 1663038 is 8303661.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16095 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2^1663038 is an apocalyptic number.

1663038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096640).

1663038 is an abundant number, since it is smaller than the sum of its proper divisors (2530242).

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

1663038 is a wasteful number, since it uses less digits than its factorization.

1663038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1663038 is about 1289.5883063986. The cubic root of 1663038 is about 118.4770024270.

Multiplying 1663038 by its sum of digits (27), we get a triangular number (44902026 = T₉₄₇₆).

Adding to 1663038 its reverse (8303661), we get a palindrome (9966699).

The spelling of 1663038 in words is "one million, six hundred sixty-three thousand, thirty-eight".