1428681444 has 48 divisors (see below), whose sum is σ = 3428105856. Its totient is φ = 462758400.

The previous prime is 1428681437. The next prime is 1428681451. The reversal of 1428681444 is 4441868241.

It is an interprime number because it is at equal distance from previous prime (1428681437) and next prime (1428681451).

It is a super-2 number, since 2×1428681444² = 4082261336859850272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1428681396 and 1428681405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456204 + ... + 459324.

It is an arithmetic number, because the mean of its divisors is an integer number (71418872).

Almost surely, 2^1428681444 is an apocalyptic number.

It is an amenable number.

1428681444 is an abundant number, since it is smaller than the sum of its proper divisors (1999424412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1428681444 is a wasteful number, since it uses less digits than its factorization.

1428681444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196 (or 4194 counting only the distinct ones).

The product of its digits is 196608, while the sum is 42.

The square root of 1428681444 is about 37797.9026402260. The cubic root of 1428681444 is about 1126.2767907849.

The spelling of 1428681444 in words is "one billion, four hundred twenty-eight million, six hundred eighty-one thousand, four hundred forty-four".