1428306240 has 56 divisors (see below), whose sum is σ = 4534875360. Its totient is φ = 380881408.

The previous prime is 1428306239. The next prime is 1428306251. The reversal of 1428306240 is 426038241.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1428306198 and 1428306207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742950 + ... + 744869.

Almost surely, 2^1428306240 is an apocalyptic number.

1428306240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428306240 is an abundant number, since it is smaller than the sum of its proper divisors (3106569120).

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

1428306240 is a wasteful number, since it uses less digits than its factorization.

1428306240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487839 (or 1487829 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1428306240 is about 37792.9390230503. The cubic root of 1428306240 is about 1126.1781869155.

The spelling of 1428306240 in words is "one billion, four hundred twenty-eight million, three hundred six thousand, two hundred forty".