1648738 has 16 divisors (see below), whose sum is σ = 3044160. Its totient is φ = 652176.

The previous prime is 1648723. The next prime is 1648739. The reversal of 1648738 is 8378461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1648697 and 1648706.

It is not an unprimeable number, because it can be changed into a prime (1648739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4348 + ... + 4711.

It is an arithmetic number, because the mean of its divisors is an integer number (190260).

2^1648738 is an apocalyptic number.

1648738 is a deficient number, since it is larger than the sum of its proper divisors (1395422).

1648738 is a wasteful number, since it uses less digits than its factorization.

1648738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9081.

The product of its digits is 32256, while the sum is 37.

The square root of 1648738 is about 1284.0319310671. The cubic root of 1648738 is about 118.1364408541.

The spelling of 1648738 in words is "one million, six hundred forty-eight thousand, seven hundred thirty-eight".