1405828 has 6 divisors (see below), whose sum is σ = 2460206. Its totient is φ = 702912.

The previous prime is 1405823. The next prime is 1405841. The reversal of 1405828 is 8285041.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 544644 = 928^2 + 738^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1405796 and 1405805.

It is not an unprimeable number, because it can be changed into a prime (1405823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175725 + ... + 175732.

2^1405828 is an apocalyptic number.

It is an amenable number.

1405828 is a deficient number, since it is larger than the sum of its proper divisors (1054378).

1405828 is a wasteful number, since it uses less digits than its factorization.

1405828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351461 (or 351459 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 1405828 is about 1185.6761783894. The cubic root of 1405828 is about 112.0239107113.

The spelling of 1405828 in words is "one million, four hundred five thousand, eight hundred twenty-eight".