1632990 has 32 divisors (see below), whose sum is σ = 4056480. Its totient is φ = 420224.

The previous prime is 1632979. The next prime is 1632997. The reversal of 1632990 is 992361.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1632997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69 + ... + 1808.

It is an arithmetic number, because the mean of its divisors is an integer number (126765).

2^1632990 is an apocalyptic number.

1632990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1632990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028240).

1632990 is an abundant number, since it is smaller than the sum of its proper divisors (2423490).

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

1632990 is a wasteful number, since it uses less digits than its factorization.

1632990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1632990 is about 1277.8849713491. The cubic root of 1632990 is about 117.7591082969.

The spelling of 1632990 in words is "one million, six hundred thirty-two thousand, nine hundred ninety".