1631424 has 56 divisors (see below), whose sum is σ = 4480560. Its totient is φ = 523264.

The previous prime is 1631407. The next prime is 1631447. The reversal of 1631424 is 4241361.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1631424.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5422 + ... + 5714.

It is an arithmetic number, because the mean of its divisors is an integer number (80010).

2^1631424 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 1631424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2240280).

1631424 is an abundant number, since it is smaller than the sum of its proper divisors (2849136).

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

1631424 is a wasteful number, since it uses less digits than its factorization.

1631424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 327 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1631424 is about 1277.2720931736. The cubic root of 1631424 is about 117.7214534953.

Adding to 1631424 its reverse (4241361), we get a palindrome (5872785).

The spelling of 1631424 in words is "one million, six hundred thirty-one thousand, four hundred twenty-four".