1428432144 has 40 divisors (see below), whose sum is σ = 3717068640. Its totient is φ = 472666368.

The previous prime is 1428432121. The next prime is 1428432199. The reversal of 1428432144 is 4412348241.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102034 + ... + 115185.

It is an arithmetic number, because the mean of its divisors is an integer number (92926716).

Almost surely, 2^1428432144 is an apocalyptic number.

It is an amenable number.

1428432144 is an abundant number, since it is smaller than the sum of its proper divisors (2288636496).

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

1428432144 is a wasteful number, since it uses less digits than its factorization.

1428432144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217367 (or 217361 counting only the distinct ones).

The product of its digits is 24576, while the sum is 33.

The square root of 1428432144 is about 37794.6046943211. The cubic root of 1428432144 is about 1126.2112764982.

The spelling of 1428432144 in words is "one billion, four hundred twenty-eight million, four hundred thirty-two thousand, one hundred forty-four".