1648722 has 8 divisors (see below), whose sum is σ = 3297456. Its totient is φ = 549572.

The previous prime is 1648697. The next prime is 1648723. The reversal of 1648722 is 2278461.

It is a sphenic number, since it is the product of 3 distinct primes.

1648722 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1648722.

It is not an unprimeable number, because it can be changed into a prime (1648723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137388 + ... + 137399.

It is an arithmetic number, because the mean of its divisors is an integer number (412182).

2^1648722 is an apocalyptic number.

1648722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1648722 is a wasteful number, since it uses less digits than its factorization.

1648722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274792.

The product of its digits is 5376, while the sum is 30.

The square root of 1648722 is about 1284.0257006774. The cubic root of 1648722 is about 118.1360587054.

The spelling of 1648722 in words is "one million, six hundred forty-eight thousand, seven hundred twenty-two".