1428587988 has 12 divisors (see below), whose sum is σ = 3333372000. Its totient is φ = 476195992.

The previous prime is 1428587987. The next prime is 1428587989. The reversal of 1428587988 is 8897858241.

It is an interprime number because it is at equal distance from previous prime (1428587987) and next prime (1428587989).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428587987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59524488 + ... + 59524511.

It is an arithmetic number, because the mean of its divisors is an integer number (277781000).

Almost surely, 2^1428587988 is an apocalyptic number.

It is an amenable number.

1428587988 is an abundant number, since it is smaller than the sum of its proper divisors (1904784012).

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

1428587988 is a wasteful number, since it uses less digits than its factorization.

1428587988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119049006 (or 119049004 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 60.

The square root of 1428587988 is about 37796.6663609372. Note that the first 3 decimals coincide. The cubic root of 1428587988 is about 1126.2522320984.

The spelling of 1428587988 in words is "one billion, four hundred twenty-eight million, five hundred eighty-seven thousand, nine hundred eighty-eight".