1649138 has 16 divisors (see below), whose sum is σ = 2598144. Its totient is φ = 784080.

The previous prime is 1649129. The next prime is 1649147. The reversal of 1649138 is 8319461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1649129) and next prime (1649147).

It is a super-2 number, since 2×1649138² = 5439312286088, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3956 + ... + 4352.

It is an arithmetic number, because the mean of its divisors is an integer number (162384).

2^1649138 is an apocalyptic number.

1649138 is a deficient number, since it is larger than the sum of its proper divisors (949006).

1649138 is a wasteful number, since it uses less digits than its factorization.

1649138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497.

The product of its digits is 5184, while the sum is 32.

The square root of 1649138 is about 1284.1876809875. The cubic root of 1649138 is about 118.1459937678.

The spelling of 1649138 in words is "one million, six hundred forty-nine thousand, one hundred thirty-eight".