1961863200 has 576 divisors, whose sum is σ = 8099481600. Its totient is φ = 453657600.

The previous prime is 1961863193. The next prime is 1961863217. The reversal of 1961863200 is 23681691.

1961863200 is a `hidden beast` number, since 1 + 9 + 6 + 18 + 632 + 0 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5464621 + ... + 5464979.

It is an arithmetic number, because the mean of its divisors is an integer number (14061600).

Almost surely, 2^1961863200 is an apocalyptic number.

1961863200 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 1961863200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4049740800).

1961863200 is an abundant number, since it is smaller than the sum of its proper divisors (6137618400).

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

1961863200 is a wasteful number, since it uses less digits than its factorization.

1961863200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1961863200 is about 44292.9249429297. The cubic root of 1961863200 is about 1251.8613761805.

The spelling of 1961863200 in words is "one billion, nine hundred sixty-one million, eight hundred sixty-three thousand, two hundred".