1438831 has 2 divisors, whose sum is σ = 1438832. Its totient is φ = 1438830.

The previous prime is 1438817. The next prime is 1438837. The reversal of 1438831 is 1388341.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438831 is a prime.

It is a super-2 number, since 2×1438831² = 4140469293122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1438831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719415 + 719416.

It is an arithmetic number, because the mean of its divisors is an integer number (719416).

2^1438831 is an apocalyptic number.

1438831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438831 is an equidigital number, since it uses as much as digits as its factorization.

1438831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 1438831 is about 1199.5128177723. The cubic root of 1438831 is about 112.8937576620.

The spelling of 1438831 in words is "one million, four hundred thirty-eight thousand, eight hundred thirty-one".