1631648 has 12 divisors (see below), whose sum is σ = 3212370. Its totient is φ = 815808.

The previous prime is 1631647. The next prime is 1631657. The reversal of 1631648 is 8461361.

It can be written as a sum of positive squares in only one way, i.e., 1373584 + 258064 = 1172^2 + 508^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1631648.

It is not an unprimeable number, because it can be changed into a prime (1631647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25463 + ... + 25526.

2^1631648 is an apocalyptic number.

It is an amenable number.

1631648 is a deficient number, since it is larger than the sum of its proper divisors (1580722).

1631648 is an equidigital number, since it uses as much as digits as its factorization.

1631648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50999 (or 50991 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 1631648 is about 1277.3597770401. The cubic root of 1631648 is about 117.7268410992.

The spelling of 1631648 in words is "one million, six hundred thirty-one thousand, six hundred forty-eight".