1812879120 has 160 divisors (see below), whose sum is σ = 6079860864. Its totient is φ = 444211200.

The previous prime is 1812879077. The next prime is 1812879137. The reversal of 1812879120 is 219782181.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 750715 + ... + 753125.

Almost surely, 2^1812879120 is an apocalyptic number.

1812879120 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 1812879120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3039930432).

1812879120 is an abundant number, since it is smaller than the sum of its proper divisors (4266981744).

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

1812879120 is a wasteful number, since it uses less digits than its factorization.

1812879120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681 (or 2675 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1812879120 is about 42577.9182205988. The cubic root of 1812879120 is about 1219.3347443578.

The spelling of 1812879120 in words is "one billion, eight hundred twelve million, eight hundred seventy-nine thousand, one hundred twenty".