1649994 has 24 divisors (see below), whose sum is σ = 3399360. Its totient is φ = 533832.

The previous prime is 1649993. The next prime is 1650001. The reversal of 1649994 is 4999461.

It is not an unprimeable number, because it can be changed into a prime (1649993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20847 + ... + 20925.

It is an arithmetic number, because the mean of its divisors is an integer number (141640).

2^1649994 is an apocalyptic number.

1649994 is an abundant number, since it is smaller than the sum of its proper divisors (1749366).

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

1649994 is an equidigital number, since it uses as much as digits as its factorization.

1649994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 143 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 1649994 is about 1284.5209223676. The cubic root of 1649994 is about 118.1664318144.

The spelling of 1649994 in words is "one million, six hundred forty-nine thousand, nine hundred ninety-four".