1428628623 has 16 divisors (see below), whose sum is σ = 1930371840. Its totient is φ = 939698496.

The previous prime is 1428628613. The next prime is 1428628627. The reversal of 1428628623 is 3268268241.

It is not a de Polignac number, because 1428628623 - 2⁹ = 1428628111 is a prime.

It is a super-2 number, since 2×1428628623² = 4081959484909752258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428628627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124536 + ... + 135522.

It is an arithmetic number, because the mean of its divisors is an integer number (120648240).

Almost surely, 2^1428628623 is an apocalyptic number.

1428628623 is a deficient number, since it is larger than the sum of its proper divisors (501743217).

1428628623 is a wasteful number, since it uses less digits than its factorization.

1428628623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11566.

The product of its digits is 221184, while the sum is 42.

The square root of 1428628623 is about 37797.2039045218. The cubic root of 1428628623 is about 1126.2629104339.

The spelling of 1428628623 in words is "one billion, four hundred twenty-eight million, six hundred twenty-eight thousand, six hundred twenty-three".