1649960 has 64 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 573696.

The previous prime is 1649959. The next prime is 1649981. The reversal of 1649960 is 699461.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1649960.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9797 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (66150).

2^1649960 is an apocalyptic number.

1649960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116800).

1649960 is an abundant number, since it is smaller than the sum of its proper divisors (2583640).

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

1649960 is a wasteful number, since it uses less digits than its factorization.

1649960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 1649960 is about 1284.5076877933. The cubic root of 1649960 is about 118.1656201576.

The spelling of 1649960 in words is "one million, six hundred forty-nine thousand, nine hundred sixty".