1812280158 has 48 divisors (see below), whose sum is σ = 4233954816. Its totient is φ = 556925760.

The previous prime is 1812280157. The next prime is 1812280177. The reversal of 1812280158 is 8510822181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812280153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200803 + ... + 209633.

It is an arithmetic number, because the mean of its divisors is an integer number (88207392).

Almost surely, 2^1812280158 is an apocalyptic number.

1812280158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1812280158 is an abundant number, since it is smaller than the sum of its proper divisors (2421674658).

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

1812280158 is a wasteful number, since it uses less digits than its factorization.

1812280158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9729 (or 9726 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 1812280158 is about 42570.8839231698. The cubic root of 1812280158 is about 1219.2004431393.

The spelling of 1812280158 in words is "one billion, eight hundred twelve million, two hundred eighty thousand, one hundred fifty-eight".