630291900 has 216 divisors, whose sum is σ = 2164080240. Its totient is φ = 141173760.

The previous prime is 630291899. The next prime is 630291913. The reversal of 630291900 is 9192036.

It is a super-2 number, since 2×630291900² = 794535758411220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 778696 + ... + 779504.

It is an arithmetic number, because the mean of its divisors is an integer number (10018890).

Almost surely, 2^630291900 is an apocalyptic number.

630291900 is a gapful number since it is divisible by the number (60) 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 630291900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082040120).

630291900 is an abundant number, since it is smaller than the sum of its proper divisors (1533788340).

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

630291900 is a wasteful number, since it uses less digits than its factorization.

630291900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 630291900 is about 25105.6149098165. The cubic root of 630291900 is about 857.3942671243.

The spelling of 630291900 in words is "six hundred thirty million, two hundred ninety-one thousand, nine hundred".