1428831 has 6 divisors (see below), whose sum is σ = 2063880. Its totient is φ = 952548.

The previous prime is 1428811. The next prime is 1428839. The reversal of 1428831 is 1388241.

It is not a de Polignac number, because 1428831 - 2⁶ = 1428767 is a prime.

It is a super-2 number, since 2×1428831² = 4083116053122, which contains 22 as substring.

1428831 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1428795 and 1428804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428839) 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, 79371 + ... + 79388.

It is an arithmetic number, because the mean of its divisors is an integer number (343980).

2^1428831 is an apocalyptic number.

1428831 is a deficient number, since it is larger than the sum of its proper divisors (635049).

1428831 is a wasteful number, since it uses less digits than its factorization.

1428831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158765 (or 158762 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1428831 is about 1195.3371909215. The cubic root of 1428831 is about 112.6316089393.

It can be divided in two parts, 142883 and 1, that added together give a square (142884 = 378²).

The spelling of 1428831 in words is "one million, four hundred twenty-eight thousand, eight hundred thirty-one".