1428623 has 8 divisors (see below), whose sum is σ = 1646592. Its totient is φ = 1214136.

The previous prime is 1428613. The next prime is 1428631. The reversal of 1428623 is 3268241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1428623 - 2¹⁰ = 1427599 is a prime.

It is a super-2 number, since 2×1428623² = 4081927352258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1428592 and 1428601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86 + ... + 1692.

It is an arithmetic number, because the mean of its divisors is an integer number (205824).

2^1428623 is an apocalyptic number.

1428623 is a deficient number, since it is larger than the sum of its proper divisors (217969).

1428623 is a wasteful number, since it uses less digits than its factorization.

1428623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741.

The product of its digits is 2304, while the sum is 26.

The square root of 1428623 is about 1195.2501830161. The cubic root of 1428623 is about 112.6261432797.

The spelling of 1428623 in words is "one million, four hundred twenty-eight thousand, six hundred twenty-three".