1421839008 has 120 divisors (see below), whose sum is σ = 4401825120. Its totient is φ = 448986240.

The previous prime is 1421839007. The next prime is 1421839033. The reversal of 1421839008 is 8009381241.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421839007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34813 + ... + 63683.

It is an arithmetic number, because the mean of its divisors is an integer number (36681876).

Almost surely, 2^1421839008 is an apocalyptic number.

1421839008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421839008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2200912560).

1421839008 is an abundant number, since it is smaller than the sum of its proper divisors (2979986112).

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

1421839008 is a wasteful number, since it uses less digits than its factorization.

1421839008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28912 (or 28895 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1421839008 is about 37707.2805702029. The cubic root of 1421839008 is about 1124.4758731856.

The spelling of 1421839008 in words is "one billion, four hundred twenty-one million, eight hundred thirty-nine thousand, eight".