1428521892 has 36 divisors (see below), whose sum is σ = 3877418160. Its totient is φ = 408148944.

The previous prime is 1428521891. The next prime is 1428521893. The reversal of 1428521892 is 2981258241.

It is an interprime number because it is at equal distance from previous prime (1428521891) and next prime (1428521893).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1428521891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1214142 + ... + 1215317.

It is an arithmetic number, because the mean of its divisors is an integer number (107706060).

Almost surely, 2^1428521892 is an apocalyptic number.

1428521892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1428521892 is an abundant number, since it is smaller than the sum of its proper divisors (2448896268).

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

1428521892 is a wasteful number, since it uses less digits than its factorization.

1428521892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429480 (or 2429471 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 1428521892 is about 37795.7919879978. The cubic root of 1428521892 is about 1126.2348625195.

The spelling of 1428521892 in words is "one billion, four hundred twenty-eight million, five hundred twenty-one thousand, eight hundred ninety-two".