1821207960 has 384 divisors, whose sum is σ = 7366282560. Its totient is φ = 383385600.

The previous prime is 1821207953. The next prime is 1821208013. The reversal of 1821207960 is 697021281.

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

It is a congruent number.

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, 874120 + ... + 876200.

Almost surely, 2^1821207960 is an apocalyptic number.

1821207960 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 1821207960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3683141280).

1821207960 is an abundant number, since it is smaller than the sum of its proper divisors (5545074600).

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

1821207960 is a wasteful number, since it uses less digits than its factorization.

1821207960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1821207960 is about 42675.6131766141. The cubic root of 1821207960 is about 1221.1992060484.

The spelling of 1821207960 in words is "one billion, eight hundred twenty-one million, two hundred seven thousand, nine hundred sixty".