1428453840 has 160 divisors (see below), whose sum is σ = 4856832000. Its totient is φ = 344424960.

The previous prime is 1428453833. The next prime is 1428453863. The reversal of 1428453840 is 483548241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 524001 + ... + 526719.

It is an arithmetic number, because the mean of its divisors is an integer number (30355200).

Almost surely, 2^1428453840 is an apocalyptic number.

1428453840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428453840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2428416000).

1428453840 is an abundant number, since it is smaller than the sum of its proper divisors (3428378160).

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

1428453840 is a wasteful number, since it uses less digits than its factorization.

1428453840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945 (or 2939 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 1428453840 is about 37794.8917183262. The cubic root of 1428453840 is about 1126.2169783572.

The spelling of 1428453840 in words is "one billion, four hundred twenty-eight million, four hundred fifty-three thousand, eight hundred forty".