1631344 has 80 divisors (see below), whose sum is σ = 3999744. Its totient is φ = 633600.

The previous prime is 1631341. The next prime is 1631351. The reversal of 1631344 is 4431361.

It is a super-2 number, since 2×1631344² = 5322566492672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52609 + ... + 52639.

2^1631344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1631344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1999872).

1631344 is an abundant number, since it is smaller than the sum of its proper divisors (2368400).

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

1631344 is a wasteful number, since it uses less digits than its factorization.

1631344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 80 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 1631344 is about 1277.2407760481. The cubic root of 1631344 is about 117.7195292315.

The spelling of 1631344 in words is "one million, six hundred thirty-one thousand, three hundred forty-four".