1649420 has 12 divisors (see below), whose sum is σ = 3463824. Its totient is φ = 659760.

The previous prime is 1649419. The next prime is 1649429. The reversal of 1649420 is 249461.

It is a self number, because there is not a number n which added to its sum of digits gives 1649420.

It is not an unprimeable number, because it can be changed into a prime (1649429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41216 + ... + 41255.

It is an arithmetic number, because the mean of its divisors is an integer number (288652).

2^1649420 is an apocalyptic number.

1649420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649420 is an abundant number, since it is smaller than the sum of its proper divisors (1814404).

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

1649420 is a wasteful number, since it uses less digits than its factorization.

1649420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82480 (or 82478 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1649420 is about 1284.2974733293. The cubic root of 1649420 is about 118.1527276436.

The spelling of 1649420 in words is "one million, six hundred forty-nine thousand, four hundred twenty".