1630858420 has 48 divisors (see below), whose sum is σ = 3509573760. Its totient is φ = 636241536.

The previous prime is 1630858409. The next prime is 1630858421. The reversal of 1630858420 is 248580361.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1630858420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630858421) 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, 1056169 + ... + 1057711.

It is an arithmetic number, because the mean of its divisors is an integer number (73116120).

Almost surely, 2^1630858420 is an apocalyptic number.

1630858420 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 1630858420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754786880).

1630858420 is an abundant number, since it is smaller than the sum of its proper divisors (1878715340).

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

1630858420 is a wasteful number, since it uses less digits than its factorization.

1630858420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824 (or 2822 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 1630858420 is about 40383.8881238545. Note that the first 3 decimals coincide. The cubic root of 1630858420 is about 1177.0784808160.

The spelling of 1630858420 in words is "one billion, six hundred thirty million, eight hundred fifty-eight thousand, four hundred twenty".