1648988 has 18 divisors (see below), whose sum is σ = 3172848. Its totient is φ = 749320.

The previous prime is 1648987. The next prime is 1649003. The reversal of 1648988 is 8898461.

It is a happy number.

It is a super-2 number, since 2×1648988² = 5438322848288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1220 + ... + 2187.

2^1648988 is an apocalyptic number.

It is an amenable number.

1648988 is a deficient number, since it is larger than the sum of its proper divisors (1523860).

1648988 is a wasteful number, since it uses less digits than its factorization.

1648988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433 (or 3420 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 1648988 is about 1284.1292769811. The cubic root of 1648988 is about 118.1424116062.

The spelling of 1648988 in words is "one million, six hundred forty-eight thousand, nine hundred eighty-eight".