1428642420 has 24 divisors (see below), whose sum is σ = 4000198944. Its totient is φ = 380971296.

The previous prime is 1428642419. The next prime is 1428642427. The reversal of 1428642420 is 242468241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428642427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11905294 + ... + 11905413.

It is an arithmetic number, because the mean of its divisors is an integer number (166674956).

Almost surely, 2^1428642420 is an apocalyptic number.

1428642420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428642420 is an abundant number, since it is smaller than the sum of its proper divisors (2571556524).

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

1428642420 is a wasteful number, since it uses less digits than its factorization.

1428642420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23810719 (or 23810717 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 1428642420 is about 37797.3864175818. The cubic root of 1428642420 is about 1126.2665360553.

The spelling of 1428642420 in words is "one billion, four hundred twenty-eight million, six hundred forty-two thousand, four hundred twenty".