1649538 has 32 divisors (see below), whose sum is σ = 4000320. Its totient is φ = 499680.

The previous prime is 1649533. The next prime is 1649539. The reversal of 1649538 is 8359461.

1649538 is a `hidden beast` number, since 1 + 649 + 5 + 3 + 8 = 666.

It is a super-2 number, since 2×1649538² = 5441951226888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1649533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 795 + ... + 1982.

It is an arithmetic number, because the mean of its divisors is an integer number (125010).

2^1649538 is an apocalyptic number.

1649538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1649538 is an abundant number, since it is smaller than the sum of its proper divisors (2350782).

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

1649538 is a wasteful number, since it uses less digits than its factorization.

1649538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2799 (or 2793 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1649538 is about 1284.3434120203. The cubic root of 1649538 is about 118.1555451369.

It can be divided in two parts, 1649 and 538, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1649538 in words is "one million, six hundred forty-nine thousand, five hundred thirty-eight".