1428091800 has 96 divisors (see below), whose sum is σ = 4687534800. Its totient is φ = 358420480.

The previous prime is 1428091729. The next prime is 1428091829. The reversal of 1428091800 is 81908241.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59805 + ... + 80204.

Almost surely, 2^1428091800 is an apocalyptic number.

1428091800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428091800 is an abundant number, since it is smaller than the sum of its proper divisors (3259443000).

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

1428091800 is a wasteful number, since it uses less digits than its factorization.

1428091800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140045 (or 140036 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1428091800 is about 37790.1018786666. The cubic root of 1428091800 is about 1126.1218241807.

The spelling of 1428091800 in words is "one billion, four hundred twenty-eight million, ninety-one thousand, eight hundred".