1649634 has 48 divisors (see below), whose sum is σ = 3983616. Its totient is φ = 453600.

The previous prime is 1649621. The next prime is 1649639. The reversal of 1649634 is 4369461.

1649634 is nontrivially palindromic in base 5.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1649595 and 1649604.

It is not an unprimeable number, because it can be changed into a prime (1649639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9024 + ... + 9204.

It is an arithmetic number, because the mean of its divisors is an integer number (82992).

2^1649634 is an apocalyptic number.

1649634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1991808).

1649634 is an abundant number, since it is smaller than the sum of its proper divisors (2333982).

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

1649634 is a wasteful number, since it uses less digits than its factorization.

1649634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 224 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 1649634 is about 1284.3807846585. The cubic root of 1649634 is about 118.1578372357.

The spelling of 1649634 in words is "one million, six hundred forty-nine thousand, six hundred thirty-four".