1428038421 has 16 divisors (see below), whose sum is σ = 2040537984. Its totient is φ = 886019904.

The previous prime is 1428038411. The next prime is 1428038473. The reversal of 1428038421 is 1248308241.

It is not a de Polignac number, because 1428038421 - 2⁶ = 1428038357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428038411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277126 + ... + 282231.

It is an arithmetic number, because the mean of its divisors is an integer number (127533624).

Almost surely, 2^1428038421 is an apocalyptic number.

It is an amenable number.

1428038421 is a deficient number, since it is larger than the sum of its proper divisors (612499563).

1428038421 is a wasteful number, since it uses less digits than its factorization.

1428038421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559420.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1428038421 is about 37789.3956157015. The cubic root of 1428038421 is about 1126.1077933353.

The spelling of 1428038421 in words is "one billion, four hundred twenty-eight million, thirty-eight thousand, four hundred twenty-one".