1428987500 has 36 divisors (see below), whose sum is σ = 3125737440. Its totient is φ = 571590000.

The previous prime is 1428987487. The next prime is 1428987509. The reversal of 1428987500 is 57898241.

It is not an unprimeable number, because it can be changed into a prime (1428987509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44660 + ... + 69659.

It is an arithmetic number, because the mean of its divisors is an integer number (86826040).

Almost surely, 2^1428987500 is an apocalyptic number.

1428987500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428987500 is an abundant number, since it is smaller than the sum of its proper divisors (1696749940).

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

1428987500 is an equidigital number, since it uses as much as digits as its factorization.

1428987500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114348 (or 114326 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 1428987500 is about 37801.9510078514. The cubic root of 1428987500 is about 1126.3572097286.

The spelling of 1428987500 in words is "one billion, four hundred twenty-eight million, nine hundred eighty-seven thousand, five hundred".