1649556 has 18 divisors (see below), whose sum is σ = 4169802. Its totient is φ = 549840.

The previous prime is 1649539. The next prime is 1649567. The reversal of 1649556 is 6559461.

1649556 is a `hidden beast` number, since 1 + 649 + 5 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1648656 + 900 = 1284^2 + 30^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 45821 = 1649556 / (1 + 6 + 4 + 9 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1649556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22875 + ... + 22946.

2^1649556 is an apocalyptic number.

It is an amenable number.

1649556 is an abundant number, since it is smaller than the sum of its proper divisors (2520246).

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

1649556 is a wasteful number, since it uses less digits than its factorization.

1649556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45831 (or 45826 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1649556 is about 1284.3504194728. The cubic root of 1649556 is about 118.1559749122.

The spelling of 1649556 in words is "one million, six hundred forty-nine thousand, five hundred fifty-six".