1630005420 has 96 divisors (see below), whose sum is σ = 4771307520. Its totient is φ = 415284480.

The previous prime is 1630005401. The next prime is 1630005431. The reversal of 1630005420 is 245000361.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141394 + ... + 152486.

It is an arithmetic number, because the mean of its divisors is an integer number (49701120).

Almost surely, 2^1630005420 is an apocalyptic number.

1630005420 is a gapful number since it is divisible by the number (10) 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 1630005420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2385653760).

1630005420 is an abundant number, since it is smaller than the sum of its proper divisors (3141302100).

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

1630005420 is a wasteful number, since it uses less digits than its factorization.

1630005420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11215 (or 11213 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1630005420 is about 40373.3255999552. The cubic root of 1630005420 is about 1176.8732263247.

Adding to 1630005420 its reverse (245000361), we get a palindrome (1875005781).

The spelling of 1630005420 in words is "one billion, six hundred thirty million, five thousand, four hundred twenty".