1428404880 has 240 divisors, whose sum is σ = 5375977344. Its totient is φ = 312238080.

The previous prime is 1428404849. The next prime is 1428404899. The reversal of 1428404880 is 884048241.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 267840 + ... + 273120.

Almost surely, 2^1428404880 is an apocalyptic number.

1428404880 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 1428404880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2687988672).

1428404880 is an abundant number, since it is smaller than the sum of its proper divisors (3947572464).

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

1428404880 is a wasteful number, since it uses less digits than its factorization.

1428404880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334 (or 5321 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 39.

The square root of 1428404880 is about 37794.2440061976. The cubic root of 1428404880 is about 1126.2041112483.

The spelling of 1428404880 in words is "one billion, four hundred twenty-eight million, four hundred four thousand, eight hundred eighty".