1421028816 has 40 divisors (see below), whose sum is σ = 3675133824. Its totient is φ = 473141760.

The previous prime is 1421028787. The next prime is 1421028839. The reversal of 1421028816 is 6188201241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27480 + ... + 59976.

Almost surely, 2^1421028816 is an apocalyptic number.

1421028816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1421028816 is an abundant number, since it is smaller than the sum of its proper divisors (2254105008).

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

1421028816 is a wasteful number, since it uses less digits than its factorization.

1421028816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33419 (or 33413 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 1421028816 is about 37696.5358620656. The cubic root of 1421028816 is about 1124.2622497375.

The spelling of 1421028816 in words is "one billion, four hundred twenty-one million, twenty-eight thousand, eight hundred sixteen".