1428981642 has 128 divisors (see below), whose sum is σ = 3629629440. Its totient is φ = 412776000.

The previous prime is 1428981629. The next prime is 1428981649. The reversal of 1428981642 is 2461898241.

It is not an unprimeable number, because it can be changed into a prime (1428981649) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1306848 + ... + 1307940.

It is an arithmetic number, because the mean of its divisors is an integer number (28356480).

Almost surely, 2^1428981642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428981642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814814720).

1428981642 is an abundant number, since it is smaller than the sum of its proper divisors (2200647798).

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

1428981642 is a wasteful number, since it uses less digits than its factorization.

1428981642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1211 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 1428981642 is about 37801.8735249987. The cubic root of 1428981642 is about 1126.3556705947.

The spelling of 1428981642 in words is "one billion, four hundred twenty-eight million, nine hundred eighty-one thousand, six hundred forty-two".